., electrical, plumbing, foundation, etc. 

I would have a GC give you a complete and detailed Scope Of Work for the reno budget....IE how's the electrical and plumbing?

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?

We may not respond until Monday morning for a broken blind, but for HVAC during extreme temperatures, plumbing leaks and other emergencies we will and I don't understand why any owner would not want to, just out of self interest.

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.

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

No active problems, but is an old house with basement crickets, house centipedes and the occasional american cockroach  coming up the plumbing. 

Can you do the work you need to do (especially plumbing) being in the middle of the house?

Here's my situation:I own a duplex that is about 100 years old and my tenants pay for all of the utilities EXCEPT for city water (which comes out of my pocket each quarter).Both of these rental units could benefit from some plumbing updates throughout (e.g. - 1.28 gallon toilets, eco-friendly faucets, eco-friendly shower heads, etc.) as a way of helping this rental property consume significantly less water (enough to save me a few hundred bucks each year...