Now subtract the monthly taxes and insurance (say 100/mo) and that leaves you 110 a month for a mortgage payment which equates to about 20k loan.But it all depends on what your bills are.If you are going to be replacing your rent (i.e moving in) and your car is paid off, then maybe you only have 200 in payments and that leaves you able to have a PITI payment of 1090 a month.

After subtracting all of that, getting a property at 50-55% of ARV is a good target.

Do I subtract 5-10k off the offer for my assignment fee and get it under contract for 30-35k and advertise it for 40-45k?

Furthermore since you are paying yourself the interest, you do have the option to subtract whatever interest you paid yourself from your ongoing 401k contributions without affecting your 401k savings rate.

Then make sure to subtract realtor fees, closing costs for you and the buyer and any concessions from the sale price.If you could rehab for $30k that'd be a sweet deal, otherwise I would walk.

@Walker Hinshawhe wont be living it is. i am going to give him a down payment. it is giving him more money that i can offer... as i am typing this is came to me that, if they are going to pay for property taxes anyway, why not just subtract it as i normally would. 

I checked the Assessor website to find that the Property Tax is about $6000.00.When I subtract the Property Taxes from the Expenses I am Left of with $3700.00 which is $308.00 a moth!!!

I normally expect to pay two dollars a square foot materials and labor for laminate floor installed.The flooring I get is about $.70, the guy charge me a buck and I assume there is some waste.Just had a few small studios done that are a little under 500 ft.², maybe closer to 4 ft.² when you subtract the bathroom.

Just enter in the following formula and it will tell you what the remaining loan balance is at any point in time, with which you can subtract it from the original balance to see what you have paid off. 

Subtract the cost to develop from the end value.