Najeh,You will want to focus on investing in areas where basic improvements such as curb appeal and internal updates (ie kitchen/bathrooms) would support higher property values that you could refinance or sell to make your money back. 

Essentially my bottom line will likely be effected nearly 30-40% because of discounts I will have to give for longer stays.I guess my questions are the following:1.

I'm debating to just giving the buyer a discount or money back so that he can address these repairs after closing but I just thought if I did these repairs prior to closing, if that would benefit me tax wise.If I put in a new roof and add a new sewer pipe to the property would that have any tax advantages even though I am selling the property in the same year?

A Comprehensive Guide to Homebuying, it's essential to be thorough and methodical to ensure you're making an informed decision but draw boundaries, it's okay to open built-in closets and kitchen cabinets to assess the property, However, respect the seller's privacy by not invading their personal space, such as medicine cabinets, storage boxes, or clothing drawers,Interior:Architectural style.Bedroom and bathroom count, size, and location.Closet and storage space.Number of floors.Sightlines and general floorplan.Appliance age and condition.Light switches and socket count.Plumbing and water pressure.Natural light and views.Noise levels.Stairway width and type.Porches and decks.Garage and parking capacity.Proximity to neighboring homes.Remodeling opportunities.Exterior:Roof and siding condition.Landscaping and outdoor maintenance needs.Additional Considerations:Take notes and photos during the tour.Use your five senses to assess the home's condition.Ask your real estate agent questions about the home's features, flaws, and market conditions.Red Flags:Overly scented rooms.Water stains and damage.Lack of maintenance.Foundation issues.Sagging ceiling.Fresh paint that may be covering up issues.Final Tips:Be prepared to make multiple offers before finding the right home at the right price.Stick to your budget when making an offer.Don't overlook potential red flags just because you love a home.

Can you charge higher rent to make up for the power bill discount? 

I have a 4 bedroom house with 2.5 bathrooms.  

I have a 2 bedroom/2 bathroom duplex in Houston, located in a higher socioeconomic demographic area.

Also having a private bathroom for each bedroom is a huge plus.

All new kitchen and bathrooms, painting throughout, scraping and refinishing the hardwood floors.

Maybe I am wrong, because I am very new to this, but I wouldn't discount the eastern side of the state just yet.