Originally posted by Wired your not wrong, the K5 I think was the best feeling body, the 16mp was very manageable especially for family/casual shooting, buffer is good. solid camera. my biggest issue there was the AF point spread was crap, (K3 is crap compared to what I've been used to with my 2 kits for 2015-2016 being Nikon D800/D810 and Fuji XT1) but it is manageable.
I don't know of any AF adapters for K lenses. I did try to get one of the manufacturers to make one when I used the Sony A7r.
If you've kept the 31/43/77 combo, best stick to native mount. The K-5IIs AF noticably outperformed the K-5 in my opinion (I had a K-5 followed by the IIs, followed by the K-3 and K-1).
You never know, used K-1's might turn up for sale soon.
Might be best to keep saving and forget cameras for a while. I'm in a similar boat right now due to illness and need to sell a bunch of stuff.
Less is more, keeps the stress down. Give yourself a really big financial margin of safety first. Times are strange and likely to get stranger.