These can be refinished and look great.

So, now I've gone from a cashflowing property to a property that's costing me a mortgage payment every month and needs over $50k of work (the only way to fix the problem was to demo all of the flood damaged drywall, cabinetry, and  trim, jackhammer through the slab, excavate and remove over 5 truckloads of concrete and clay (by hand), install and plumb an industrial level sump and irrigation system, backfill it with rock (by hand), re-pour the slab, and re-finish everything.How is this relevant to your question?

From what I can see, the improvements include a new kitchen, paint, refinish floors. . . .then a $200k price jump 2 month later.

Also, HD sells a "cabinet refinishing" kit for around $35 that I've used that works wonders on old cabinets.

After the first year I replaced the kitchen cabinets and refinished the hardwood.

it's hard to imagine how new, standard cabinets or a professional refinish would not help you get top dollar and sell it more quickly.

Any direction would be very helpful.1) take existing oak cabinetry and refinish in white2) install hvac for 1500 sqft house : 5 bedrooms spanning 2 floors

It baffles me that they would spend all of this time and money to attract a customer and then not do the job.I had a guy refinish hardwood floors for me in the past that did a great job and charged $1.50 per square foot for natural finish.

Refinishing cabinet doors is very time consuming, there is nuance to how you measure replacement doors, and it's better to just replace the whole cabinet as opposed to the doors only.

Finishes are typically fast but my drywall messed up so it took me another month to refinish it for paint 2x.