I want to grow my knowledge on rehabs for the properties I get in so that I can at least get a rough estimate in my head while walking the properties with my investors.

What type of work needs to be done for that estimate?

I'm also wondering if anybody knows the costs and rules for bringing in water and power to a piece of land in these areas, I know it's different for each property but is there any possible way to get estimates on bringing in water and power to a piece of land I want to purchase before actually buying the property so I can create a general budget for buikding a home.

@Alec Jacobs it’s been a few years but when we did it, we got a ridiculous range of pricing so definitely get more estimates.

With CAP rate take the annual rental income (of all 5 homes) annualized with the home #1 at estimated $1000 per month gets you $64500 per year gross income. 

Finally, If I'm living in the 3rd unit and plan to move out upon purchase of a new property, can they estimate the income of the 3rd unit will provide with me moving out and apply that to the property's sustainability?

Just trying to rough estimate total rehab costs before putting in an offer!

Using a contractor contact the rough estimate of work required is 20-25K.   

Conventional lending has 2 reasons they want a borrowers loan to be ___% less than estimated market value.

Just put income from your last job and put an estimate of what you will make in youre new job.