I’m a portuguese handyman with specific knowledge in house renovations with skills such as plumbing and electricity covered as well. 

Also what type of repairs-new hot water tank, replacing all the electrical and plumbing?

My background is in math and engineering so I also think it'd be cool to analyze their spending and maybe start recognizing areas for improvements. 

We sub out all electrical, mechanicals, plumbing, and some exterior and flooring. 

I work full time at a local Chip( hint people think i work at Stadium) company as an Telecom engineer for last  20 years and still love the work i do and hopefully they don't fire me.

These expenditures are capitalized, meaning they are added to the property's basis and depreciated over time.Examples of Capital ExpendituresBuilding Additions: Adding a new room, deck, or other structural improvements.Major Renovations: Remodeling a kitchen or bathroom, replacing the roof, or significant electrical and plumbing upgrades.Appliance Replacement: Installing new HVAC systems, water heaters, or other major appliances.Structural Repairs: Replacing the foundation or significant repairs to the building’s structure.Labor CostsLabor Costs: The costs paid to contractors, electricians, plumbers, carpenters, and other professionals involved in the renovation are part of capital expenditures.Example of Capital Expenditures with LaborSuppose you renovate a rental property, including a new kitchen and bathroom.Materials: $15,000Labor Costs: $10,000Total Capital Expenditure: $25,000This $25,000 would be capitalized and added to the property's basis.

The stove & hot water heater are currently electric. 

at a bare minimum, new paint and carpet/plank everywhere and changing out all the cabinet hardware, electrical covers, fresh light fixtures, etc. will make things look fresh and clean.

Energy (propane/electric) costs annually are atleast double to triple for an indoor heated pool, unless it is a small fiberglass insert which guests detest as they are just a little larger than a hot tub. 

IF however you want to generate leads or traffic to the website, SEO(search engine optimization) becomes quite important.