Please bare with me as I do not pride myself in my grammar or writing, I'm a designer, GC and a hands on learner.I'm going to try to keep this quick and concise but always happy to give the long winded story over a cup of coffee with anyone who's interested.

Without knowing what your market rents at we can't know whether or not the math works.As far as I know, your biggest cons are easily replaced fixtures.

I re-painted the main house, added sound proofing to the drywall, refinished the bathrooms, added new light fixtures, and just finished converting the 2 car garage into its own unit, one of the bathrooms is downstairs near the garage door, so instead of adding a bathroom in the converted garage, I simply gave them that bathroom (cut down significantly in costs as well).

New roof 2022, new floor, paint, toilets, vanities, doors, light fixtures. basics lipstick rehab.

But I plan to add value by applying a new coat of paint, updating the doors and fixtures.

Then plumbing vanity and with fixtures and attaching countertop to vanity and attaching vanity to wall.

These things literally never happen in construction.....and it is almost always the customers fault....changes to materials, colors, fixtures, etc....So I would focus on finding a great Contractor to work with and be uber-clear in your desires on the project.

I updated the flooring through out the house, painted and updated all fixtures in the bathrooms.

I'd ask yourself the question, "In 10 years why should someone buy my house if there's a brand new one with the latest styling and fixtures down the road for the same price or slightly more."  

@Douglas Gratz You've already mentioned a couple things, but I used to always order a few things as soon as I signed the contract 1) Windows and doors 2) Cabinets (I assume you're going with custom cabinets) 3) Any fixtures or appliances that have even a slightly longer projected lead time 4) Any 'specials' that the client might want but has forgotten about now I.E.