A few months ago around Christmas time we were doing a bathroom remodel for a new homeowner on a house that was flipped, the master bathroom was a disaster, there isn't enough space to go into all the things wrong, so I'll just tell you about the bathtub - jetted tub they bought from Home Depot, so it was a de-engineered Jacuzzi model, low horsepower pump, less jets than the non Home Depot version, but it looked new and shiney. 1) Tub wasn't sitting on the sub-floor, was suspended by it's rim, even it they had built the tub deck correctly to size based on everything else I sure they wouldn't have poured a mortar base for it to sit in.

 $5,000 (could go with cheaper laminant and save $1,500)4) Gut the two small bathrooms $7,000 (Replace bisque jetted bath tub with white standard tub, reframe leaky tile shower, replace vanities/ toilets.)5) resurface kitchen cabinet doors $1,6006) granite counter top ~$3,0007) Remove structural wall separating living rooms $2,0008) GE appliances $2,200There is other work to be done (HVAC, foundation, paint etc.) but items above are the ones with potential for cost savings. 

But I imagine these would be the best:1) Update your fixtures.2) Reglaze the bathtub.3) New blinds.4) Walkway.What those four have in common is that they are fairly inexpensive but increase visual appeal.

The problem persisted, so we  pressure tested all the lines in the house (found two leaky valves - under 100 PSI - but nothing to explain the increased water consumption).Then we found the cause - a disgruntled tenant (who was moving at the end of his lease) who would come home in the evening and leave the bathtub spigot running for an extended period of time (another tenant ratted him out as they were tired of all our intrusions while looking for the problem).  

The flooring is fine but the toilet, bathtub, and there is a window I want to replace with all glass that I would like done.

The contractor also did the bathroom (vanity, tile, toilet, refinish the bathtub).

(This would explain why no reglazer would give warranty on a kitchen sink, and they all seem pretty pessimistic about the lifetime.)So it seems like reglazing is inappropriate for heavy-use sinks, like in the kitchen (it's still okay for bathtubs and bathroom sinks). 

Then I start pointing out the dripping this and the disgusting that, the funky smell over there and whatever that is in the corner over there and he eventually comes around to my way of thinking.He was convinced that we could just clean the bathtub and tile.  

Those seniors will want doors and faucets that are easier to turn and a bathtub that is easy to get into, a few more garden areas, plus perhaps a simple play structure in the backyard for the grandkids.3.

These are the top things we change:Add a bathroom if you can near existing plumbing. i.e. add a Master Bath if a wall is shared with the hall bath.Update the kitchen: cabinets, fixtures, appliancesUpdate bathrooms: cabinets, tile, toilet, bathtub/shower if neededPut in pergo or wood floorspaint everything inside and outchange any non-modern light fixtures and fans.Don't pick fancy and expensive stuff - you start to get into personal tastes.