I was looking at DSCR loans because they don't require extensive checks like the bank loans and they "only" look at the income generated from the property to qualify for the loan.

Loan Amount: We specify this as a percent of the purchase price.

I own a mortgage company, so I have my loan officers use this Fannie Mae income calculation tool for all business for self borrowers: https://singlefamily.fanniemae.com/applications-technology/income-calculator .

Has anyone have any experience acquiring multifamily property using a SBA loan like to get your thoughts?

You're probably better off getting a Hard Money Loan.

On top of that you have lower taxes, insurance and a lack of HOA's.

More on DSCR loans: DSCR loans won't use your income to underwrite the loan. 

Year long lease typically, with subletting allowed to offset summer months cost to tenant.I worked out some high-level math: Assuming there is a 6 bedroom single family house for sale for 800k, and I can rent for 6k/month.Financing: 350k cash, 450k loan @30yr, 3.8%.Assumptions: 7% vacancy/yr, $4000/yr repairs, $10k/yr property tax, $4k/yr insurance, 8% management fee+50% first month rent on new leaseMonth-to-month breakdown: Income: $6000 Vacancy, Mgmt fee, repair, taxes, insurance: $2300Loan PI: $2650I'd take home ~$1000/month. 

I'm going to ask my insurance company.

IF you need 100% financing and lets say its $200k deal, the lender will be interest only at $150k at 12% = 1500/mo + taxes. insurance etc.