Hey Andrew! Good to see you in here :) This is a great place to get information from investors all over the country!
I took a class on calculating offers based on rental expenses. There a few ways of doing it and it all depends on what your end goal is. The person teaching the class that I took wasn't worried much about appreciation or the selling value of the property since his main focus was monthly cash flow over a long period of time. If this is the case with you, you have to decide what you want your monthly profit to be. The person teaching my class looked for at least $200/month in profit after all expenses - doesn't seem like much but as a buy-and-hold investor, you aren't getting rich off of one property. You will build a portfolio and after 10 properties making a profit of $200/month, you'll be bringing is $2,000 of passive income every month. It builds on itself.
So lets take your current rental in Belcamp and pretend that you don't own it yet. When you bought it, you purchased it as a residence as a retail buyer, so the numbers are going to be different when you look at it as an investment from the beginning.
So you would take:
$1,400/month (rent)
- $98 (management fee)
- *$81.67 (leasing fee, 70% of first month's rent broken out over 12 months)
- $157.58 (taxes, based on your 2014 tax record)
- $50 (insurance estimate)
- $66 (HOA fee)
- **$140 (repairs @ 10%)
- $98 (vacancy @ 7%)
- $200 (desired profit)
= 508.75 left over to pay your loan payment
* The leasing fee will most likely not be a yearly expense, but its good to calculate for the worst-case scenario so that you're prepared. If you don't incur the cost that you allotted for, more profit in your pocket!
** In our area and for a house as "young" as yours, a 10% per month repair fund is adequate. If you bought a much older house that requires more maintenance, then you would have to adjust your monthly repair estimate accordingly.
As an investor, your loans will be different than what you have been used to as a homeowner. You may get bank loans for a few, but banks will only lend on a small amount of properties so you'll most likely end up doing owner financing, private funding, or hard-money loans. In that case, your taxes and insurance will not be included with the mortgage payment, which is why I broke it out above.
So now you know what your mortgage payment has to be in order to make a monthly profit on the property. The next step is to use an amortization schedule to determine what your total loan amount can be to ensure that you make your $200 profit. I use a financial calculator to figure this out, but you can go old-school and get an actual amortization book to determine this figure. Its really easy to use!
Assuming you're doing a 30 year loan at 4.125% interest (to make it easy), you could finance up to $104,972.72 for this particular property. This would include the purchase AND any necessary repairs/renovations.
Your numbers will vary based on interest rate, loan term, down payment, etc., but hopefully this at least gets you thinking :) Here is a link to the class that I took through the Baltimore REIA in case you want to do it yourself:
http://www.baltimorereia.com/start-me-up-2015/