Having access to the Central FL MLS I put together a bar chart that shows exactly what Scott is saying is true.  

Your mortgage must point to a specific property using a precise legal description, not an email.

it might have too many features making it a bit difficult to get used to but the gantt charts are pretty slick. 

I'd also recommend you buy the version which you can see (hard copy, kindle) this way you can see the graphs or charts.

If you meet those criteria, you will have sufficient financial margin to make a profit even if the market tanks (in fact, that is precisely how I reverse engineer what a great deal is).

I would like to have a more precise rental value per apt than $2500-$3000/mo. 

The consequence of that might be precisely what you’re looking to avoid.

Figure out how much you want to make and use a good deal analyzer and that is a way better/precise way to do it in my opinion. 70% rule is more a lender's number as @Crystal Smith noted. 

What size, because because a 240 Unit place will have a much different plan than a 10 unit place.How about this for a start.Rent units out as-is for whatever the market will bring and pay the loan, taxes, insurance, and maintenance.Pocket the difference and either use it to live more comfortably, or set it aside for another down payment.Take whatever tax benefits you can.If you want to go more in depth than something like that (a numbers based plan), I like to start with the existing chart of accounts as budget line items.Put down the amounts spent, adjust each year for inflation, and figure out when, and why money will be spent each year.As you spend your (future money in your mind) you are coming up with your business plan for that time period.Be sure to project REALISTIC income against your expenses and also project where additional cash will come from, Refi, Grants, etc...If you want to go the formal rout and use a software such as LivePlan without doing the budget part above first, your BizPlan may look like an empty box.

@Neil Schlimgen I can answer this question will very precise information.With a "conforming, conventional" loan (loans governed by Fannie Mae and Freddie Mac) they will require you to have 2 years of commission and bonus to use that income.