The most expensive part here is the countertops, which is pretty hard to do on your own, especially if you're doing stone (super heavy, special tools to cut to size, etc). That alone is probably $3-5k.

The rest is pretty easy to DIY:

• decent laminate flooring that looks like wood - <$1/sq ft; hard wood is $2-4/sq ft - <$500 including any tools, fixes to subfloor, etc
• cabinet doors (assuming you don't need to replace the whole thing) - $25/door, plus cost of paint/stain (idk, $50? $100 max?); looks like ~$500 for the above kitchen?
• sink, faucet, etc - quite variable, but probably <$500 even for fancier options

So you could probably do <$5k if you're in the budget range, <$10k for something a bit nicer, assuming you DIY most of it. This doesn't count appliances and whatnot, which IMO shouldn't be part of a reno unless you're specifically planning to change the size of the appliances (e.g. you want an in-set oven, larger fridge, built-in stove, etc).

If you ask a contractor, they'll probably say $15-30k, and it could go up from there.

This is just some back-of-the-napkin math after some light browsing on Home Depot.