Dream router : $266
U6 LR :239
This Unifi Ubiquiti Compatible Horizontal Wall Mount for UAP-AC-PRO, HD, SHD, U6-PRO
https://a.co/d/8FTvqAY (or any other wall mount you would like): $29
Put the dream router in the basement, feeding the rest of the house. Use that mount and put the U6 LR high up a wall on the top floor hopefully some where central. If you need to buy some cabling cover you can get that on Amazon as well for under $30. You will have more than enough coverage for the entire house and the dream router will power the LR as well as give you great coverage mixed with with LR.
The new UniFi setup almost does everything for you so it’s much less technical then it used to be. A few settings need to be optimized but beyond that you will be good to go and not have to worry about it for another 6 years or so.
I’m still on my gear I bought 6 years ago (minus a DReam machine pro I got 3 years ago) and everything runs amazing.