Second this; I picked up a 55" TCL 6 series at Best Buy and it's definitely the best money I've spent in a minute dollar for dollar.In my opinion, there are only 2 brands I would ever purchase. LG OLEDs (55” is the smallest) or one of the TCL 4Ks. The TCLs are high quality and cheap. I personally wouldn’t go below 55” for a 4K. If you really want 42”, your best bet is a TCL
You have to know what you're getting into with a TCL TV though; you aren't getting the best TV on the market overall, but at the price point alone, you definitely won't find a better TV.
TCL has image quality on par (and in some cases, better) with big brand TVs twice the price.
If you want that premium UHD HDR experience, you have to go with an LG TV, but there's a steep price tag for that experience.
I can't recommend TCL enough ESPECIALLY if you're on a budget, but still a good option even if you aren't.