The supply of great guitars that fit your criteria is huge. Mine all happen to be built in South Korea, and all happened to cost the same!
I have a Newark series Guild Starfire II hollowbody that I love. Sweetwater "blem" deal for about $550
Gretsch Electromatic series. Mine are the G5420T...
Although I don't have a direct answer for you, the humidity levels seems fine. Perhaps a bit dry if anything. Try a small humidifier in the room you keep your guitars in. And yes, temperature and humidity are directly related, hence the term, "relative humidity".
'96 ASAT. big neck, 9.5" radius. One of the best guitars I've ever touched. Sold it to buy a Guild F-50 which turned out to be a dog. :nuts
Someone here from Hawaii bought it. Hope he's still enjoying it :beer
I gave a Les Paul Jr away to my son's half brother. I also gave him a Bugera 6260 head (5150 clone)
I gave a Seagull acoustic electric to a local aspiring musician https://www.facebook.com/tylerfauxbelmusic/
I gave my friend's daughter a nice Breedlove OM for Christmas.
I gave a Bad Cat Cougar...
I have the T486B with P90's and a Bigsby. The "Standard" T486 with humbuckers (Duncan 59 & Jazz) and a stop tailpiece is an outstanding guitar and far above its price point in quality. I got mine at South Shore Music in Mass. They have 3 in stock...
I have that very case that I used for both my LP Jr and LP Jr Special. I recently sold them both with the factory gig bags, and still have the case. It's in excellent condition....PM me if you're interested