I think timeshares in general and MVC specifically are great for some people and horrible for others. It's ALWAYS a bad idea to buy retail for a someone new to the concept and almost always as their first purchase and truthfully it's VERY rare for retail to make sense for any purchase. My view is you first decide what your vacation profile is. First and foremost is budget. Can one afford it by paying cash and will the yearly commitments cause a strain on the budget going forward, if there's a problem with either of these areas, do not buy. Then consider where you likely will travel routinely, how far in advance you can and will plan, how flexible you are, usual length of travel and unit size needed for most trips. IMO for timeshares to make sense one needs to be flexible, they need to be able to plan a good 12 months in advance, value the extra space/kitchen and be OK with what one is giving up such as some level of control, daily housekeeping and being limited to the timeshare options at least for that travel. In no circumstances does it make sense to buy for non timeshare options like hotels, cruise, land tours.
Assuming one fits the profile then they should spend a number of months learning about the system and other systems. Consider which ones fits the best esp the locations one generally prefers to travel. Maybe that's MVC, but maybe it's Wyndham, Bluegreen, Worldmark, Hilton or Hyatt. Cheapest may not be best but one wants to make informed decision. For most that new to timesharing, renting privately for at least 1 to 2 trips is best. Buying rapidly skipping the trial step or before they have all the appropriate knowledge and some experience ithinking that next trip is a discount is a very poor plan IMO.
Resale can be dramatically cheaper for many options and modestly so for others. For MVC, buying weeks resale is almost always the best option even if they want to end up with some points. Resale weeks can give you lots of options and in some ways is even more flexible than points though not in others. If there's a main location you would routinely go, buying what will get you there directly is often best. For those that are extremely flexible, buying a trading week can be the best, for others not though ia trading week can add significant value to one's options even if not the main mode of usage.
Let me add that when I say flexible, that doesn't mean 2 weeks around spring break and 2 weeks mid summer across 1 or 2 resorts, one needs to be FAR more flexible than that OR buy the option that will basically guarantee that access which will usually be quite a bit more expensive. Getting the points option will add considerable cost but can be far cheaper than just buying points retail and even resale points. Worst case scenario you buy a week that roughly matches the points you need and do so retail. The up front cost will be close to the same but the yearly costs should be far less and you'll generally have more options. You can only do this at places that are in active sales and don't sell points like Spain, Aruba, St. Kitts, etc. An even better option for many is to buy one or more weeks resale then buying a qualifying week to give points on the resale weeks, again for Aruba, etc. Spain is usually the cheapest to do so. Another option for those that feel they need a lot of points (like 20K) is ia an option I consider more risky at present a fractional For Grand Residence at Lake Tahoe then pay to enroll it. The will be a large up front cost but still far cheaper than buying that many points and will be a lot cheaper yearly than owning points. I consider it risky for 2 reasons. One is they are likely to have some significant fee increase upcoming because they've underfunded the reserves and even more importantly is the BOD and MVC are at odds right now basically over the budget and there is the possibility that the resort will cease to be in the MVC system. Not saying it'll go away but it could and one needs to understand that risk.
If you'll post more about your plans and usual travel patterns we can offer more tailored advice.