For existing buildings, there can be a grandfathering of the existing hook-ups, but some places do not grandfather so keeping storm water out of the sanitary waste water sewer is a must in those places.EDIT: I see you are in PA, so you should know that the City of Philadelphia has a mixed system, where storm drains are tied into the sanitary system.

My job just came to an end(the contract expired) so I don't think I could even get a commercial loan.If everything goes right with the fourplex hopefully I will move up in the future/A real quick back of the napkin check of the numbers tells me that if your rent estimates are accurate and your construction costs are accurate, the estimated cap rate is around 13%.

First, let me do a little back-o-the-napkin math with some guesses.  

I have been reading and researching the site and many of your blogs as much as I can as I did not want to ask the same questions you have already answered a million times:) First off I wanted send thanks @Ali Boone as her article "Rental Property Numbers so Easy You Can Calculate Them on a Napkin" was invaluable to me!

We go out, take a look at the project, and then provide an engagement letter showing our prices for preliminary (napkin-type) floor plans, lead tests, asbestos testing, survey, and any other preliminary items that need to be accomplished.This tends to run off the people who aren't serious or will be bad customers in the future. 

Don't exclude a % for vacancy, prop mngt, repairs,cap ex, garbage removal, snow/lawn care, and sanitary/water.If you're still getting $800 after those expenses, that's one hell of a deal.

adsource=&id=#indforms) has forms that tend to be used by other investors.You can make offers on just about anything, i.e. yellow note pad, napkin, and a business card (a favorite of Pete Fortunato).I would try to make the forms look consistent.

Does not get damaged from moisture.It's sanitary and pet-proof so our tenants have appreciated this fact.It looks good.  

This means all pipes, drains, valves, sinks, bathtubs, toilets, water and sanitary sewer collection equipment.

I was not trying to imply that flipping or rehab and hold requires the detailed planning of a software product {though you would be surprised how many of those are fly-by-the-seat-of-the-pants ventures).The plan may be in your head, a drawing on the back of a napkin, or a spreadsheet on your computer, but there is a plan of some form.