I skimmed thru the 5 pages, so this may have already been pointed out.
(1) The original poster's upgrades may not be usable or liked by someone else (too personal, 'bad taste', poorly done, etc...) and the buyer would have the expense of UN-DOING these improvements. i.e. - someone put an expensive PERSONALIZED paint job on a car, but to almost everone else, it's dawg ugly. Will he get the extra $$ for the ugly paint???
(2) The actual appraisal may not account for some of the improvements, so the bank wouldn't loan that much money anyway. So it's sell for the appraised price, or find someone who wants the improvements and has the extra money to pay
above the appraised price.