@Justin O'Malley forgive me for the book.
Looking at in from an analysts perspective, the margins are very thin but there's hope. Lets take a look:
Let's assume you buy below ask @ $122,000 (never pay asking) with 15% DP ($18,300 initial investment)
This puts you at 85% leverage w/ a debt of $103,700. Rates are higher for investment properties and lets assume your credit is perfect. We will go $103,700 @ 6.375%. That calculates to a P&I of $646.
For CAPEX a safe bet would be to assume it at 1% of asking per annum. SO in this case lets say $130 to be safe. I wouldn't go into an investment without a reserve, for an older property especially. Things seem to always break after you buy them. But if your cash strapped then proceed at your own risk, the risk of eating up your returns.
Some of the repair costs can be assumed with your deposits if they are caused by your tenants. Otherwise we will just go with your original estimate of $100. But you need to consider turn over costs between tenants.
You can safely assume, given the location of the property, that the vacancy will be kept at a minimum but again we will assume your original estimate of $80.
Management costs will be a toss up. Remember, with property managers, you get what you pay for. $100 it will be.
Insurance and tax @ $220.
This puts your expenses @ $630 + debt servicing $646 = $1276. Pretty close to your original estimate
There is, however, a major caveat when it comes to student housing. Your rents aren't necessarily dictated by the market. They are dictated by the student housing rates for the colleges nearby. You are looking at a 4 bedroom house. That's 4 students in one house who all get a nice fat housing check at the beginning of each semester. Aside from the obvious potential for damage this gives you a major advantage. Some student housing allowances can reach as high as $6k a semester. Because of this you are practically guaranteed rent along with a very hefty security deposit. Just a quick glance at Lakewood rents, a 4 bedroom 2 bath house, is averaging $2500 (apartments.com).
Lets assume you could get $2100 a month. Now we are talking! That puts your monthly NOI @ $1470, that gives you a CAP @ 14.45%! After debt servicing you take home $824. However, if your estimate holds and you rent at market then it's a no brainer...pass.
When doing a predictive analysis you always assume the worst feasible scenario. If you still maintain a good IRR then the investment can seriously be considered. In this case if you can achieve the best scenario, then @ the five year mark (not counting inflation) you are looking at a 30.82% IRR...not including equity. The worst however, gives you an IRR of -28.47%...ouch.
This is a back of the envelope analysis off the top of my dome, so forgive me if there are a few discrepancies, a BS in applied mathematics ain't what it used to be. There are a great deal of variables that can have a drastic effect on your returns so just be careful. Message me if you want a serious hard numbers analysis and we can work it out. I was an RE investment analyst for 8 years so with more detail and some time I could give you a +/- 10%.