Would you make this deal or not?

[Mike S.]

Hi Landlords, Property Owners & Smart People,

Currently, my properties are turning great returns and are providing me with wealth (not substantial but pretty kick ***).  I am looking at a deal for a long term hold and in it to win it, but strangely confused - looking for your assistance.  

Here is the deal - not sure if it is complex but I will do my best to explain:

Property A 

Purchased at 305k, renovated, rented and retaining: Single family renting at $5000 a month - great cash flow - equity in home is substantial - value of home is over 700k; currently have 1 mortgage on home and owe $220k; have equity line of credit of $150k and have not touched it; Net Annual Return is 44% roughly (probably won't come across anything like this again) 

Property B

Purchased at 450k, renovated rented and retaining: single family renting at $4000 a month - decent cash flow - equity in home has increased due to reno - value now worth near $550k conservatively and have 1 mortgage on home; not really interested in doing to much more with this property at the moment; Net Annual Return is around 10% (put a substantial down payment down to increase cash flow)

Property C - Looking at dealing - Buy? or not? 

Asking 650k, needs upgrading - kitchen, flooring e.g..; renting at $4425; knowing what the market is at 30 year 5.6% for investment properties or even a 15/1 arm 5.5%; do the numbers work out? depends on how you buy? or again look at long term hold? IF (and thats a big if) I can get in at near 600k; how can you finance this to make it work? does it make sense to use the Line Of Credit from Property A for down payment?  

How I see the numbers - and looking for feedback here

$2500 for mortgage 

$700 for interest line of credit (is based off prime and adjustable monthly)

900 for taxes (name of the game for playing in this city)

$150 for ins

To close to deal, to risky? All thoughts welcomed. 

Thanks!