Jeremy,
Use the rental property calculator to run your numbers. Podcast are your best source of information. Takes time but WELL worth the investment.
I just purchased/rehabbed/rented my first duplex with much success. Bought it in foreclosure from a bank, re-habbed it and rented it. Key note....just b/c a bank owns it doesn't mean you don't make low offers. Duplex was listed for $54k and I bought it for $30k. Never would have imagined they would take the offer! Put $30k into it (LOC) and currently renting it for $550 per door which includes lawn care.
I learned a ton about creative financing thru the podcast and used it on this deal. Bought the property thru conventional loan, used LOC to rehab and plan is to own for 1 year and go to the bank to re-fiance and do the process all over again. If you don't have access to LOC, find a partner and start an LLC. You bring the deal/numbers/sweat equity to the table and let the partner bring the LOC.
Just bought a triplex and going thru the process all over again!
50% of something is better than 100% of nothing.