These aren't going to have much cash flow if you refi. $3300 in gross rents, less 50% (see Rental Property forum) leaves $1650 in NOI. You're probably talking three separate loans, so maybe $3-4K in closing costs each. Payment on $250K, assuming you can get all your cash back, at 6% for 30 years would be right at $1500. That leaves you only $150 in cash flow for five units. $30/unit. Perhaps better if you're doing the management and maintenance yourself.
You're asking about doing a cash out refinance. That's tough to do these days. You're going to be limited to 75% LTV for a conventional loan, assuming your primary residence is the only other property with a mortgage. Some lenders will count the rent, some will require it appear on two tax statements before they will count it. If they do, they will take 75% of the rent, less the expected PITI payment and call what's left "net rental income".
You'll need to have enough income on your tax returns to support the mortgages. If you're self employed, and show little income, you're going to have a tough time. State loans are non-existent.
For each loan, you'll need to show reserves equal to two months PITIA (a = anything else, like a HOA), for each of the existing mortgages plus six months PITIA for the new one.
You may have better luck with a small bank in the area where you have the properties. Some banks will do commercial loans. The term is going to be shorter, typically 15 years max, and the rate will be higher.
You're likely to have to wait a year to refi, unless you're willing to use the price you paid plus rehab as the value. If you want to use a new appraisal, plan on a year.