For newly constructed, purchased or renovated properties and also retroactive generally over the last 10 years, building components are properly classified into individual units of property and accurate recovery periods for computing depreciation deductions.

Just remember the trade off, eggshell is easier to clean but shows more imperfections.  

It sounds like the sub trades, particularly a site work sub contactor and a plumber who does underground work/utilities is what you are seeking.

If I gave you a range of $25 -85 and told you it depends on the specific trade, location, type of construction, density, number of stories...Knowing the costs of all the pieces is useful, but is a moving target.

I subtract those off the top to compute cashflow. 

@Jesse Dickens This sounds like one of those “programs” where they just apply to different vendors (Home Depot, staples, etc), not actual cash lines of credit….and they charge you a fee for it (maybe 10%) for these trade accounts that obviously you could have gotten yourself.

I'm wondering what lease clauses people are using for like remote-workers wanting their own office, or artists renting an apartment but not living there, or an online shop that just needs space for storage and a computer.

Since then I got into the trades actually learned how to manage a property/tenants. 

.#2 - Start going to events like those at Home Depot on Saturdays, where they show you how to tile, or other basic trade tasks. volunteer to help friends, volunteer for a Habitat For Humanity project.

(A) Any security deposit in excess of fifty dollars or one month's periodic rent, whichever is greater, shall bear interest on the excess at the rate of five per cent per annum if the tenant remains in possession of the premises for six months or more, and shall be computed and paid annually by the landlord to the tenant."