You don't need to do a "continuation" secondary post within 30 seconds of the first. Just click on Modify at the top of your last post, and type in an update.
If you have stuck sims, you don't need to confirm every time if it's ok to use ResetSim or to delete the wall/furniture/object that is causing the issues. In fact, if you want to sell everything in the house except for the museum pieces, that's okay! Deleting a glitched bed isn't cheating at all. Just don't delete/sell your museum pieces.
Before restarting your Dynasty, remove everything that isn't official EA content. The sims you already uninstalled, and any CC you got from your friend). It may not be "bad" CC, per se, but it may be reacting badly with what you already have installed.
Once that's done, make sure to delete your cache files and DCBackup. Then go ahead and open up the Dynasty file, and see if the problem is solved.