Brand with best quality control?

I have 4 friends that have bought 4 brand new MHs. Tiffin Bus which had to go back to Red Bay to fix the roof that was leaking due to design problems, Fleetwood DP whose roof was 2 ins short from the front cap and filled with Dicor and multiple other issues that caused him to sell within the year. Winnebago Adventurer that was plagued with electrical problems. Another Adventurer that was order new and came in with the wrong paint scheme and interior issuses and had to go back. In addition we have also heard many brands posted on here to the point where your afraid to buy anything. My conclusion is to buy at least a 3 year old MH that is fixed under warranty by the first owner to eliminate the major problems. Any brand can have problems. Secondly I would buy from a guy that does his own work and has kept up with all the routine maintenance. Thirdly I would look for mods and general appearance of the MH. Most people that do their own work will replace nails and staples with screws after draws and other stuff breaks,in general make improvements along the way. Look for storage, FW capacity(if you dry camp),CCC, HP/wt ratio,no leaks,no delamination and everything in working order. Lastly having said all that be prepared to fix things that break, nothing lasts for ever not even us.