-Round up and over estimate all expenses and negotiate an even better deal to account for surprises.

Say it's another $3k in closing costs (low estimate). 

And lastly some brokers purposely don’t advertise properly at least at first in order to increase the chances of double ending the deal.

The more people you talk to, the greater chance you have of landing your own deal or investing in a syndication. 

If there is a slight chance then seek out an engineer and an attorney to help you navigate through the process

Scotts "The Book on Flipping Houses" and "The Book on Estimating Rehab Costs"If you're just getting into flipping, these will really help you feel like you can tackle your first deal.

We’re estimating that the renovation can be busted out in 3-6 months (tops).

I would estimate higher 8-10% if not more.

The rent and utilities is unknown so I estimated.Rent = 900x2            1250x2Mortgage = 2000Tax = 3318Utilities = 9000Maintenance = 5160 (%10 of annual rent)Insurance = 4000Net Income = $6122 ($510/month)The insurance number and the utilities and rent are all estimated based off of my current house.

. :-)OPTION 1Current home value - 425000Extra payments - 4000Total interest spend over the loan - 85000Resulting equity - 340000 (425000-85000)Time to pay off the remaining loan in months by paying 4k extra per month - 28 monthsNext loan amount - 540000 (600000 - 60000 10% down)Extra payments - 8000Estimated home value after 10 years - 625000 (modest evaluation)Total interest spend over the loan - 60000Resulting equity - 565000 (625000-60000)Time to pay off the remaining loan in months by paying 8k extra per month - 56 monthsNext loan amount - 540000 (600000 - 60000 10% down)Extra payments - 10000Estimated home value after 10 years - 625000 (modest evaluation)Total interest spend over the loan - 50000Resulting equity - 575000 (625000-50000)Time to pay off the remaining loan in months by paying 10k extra per month - 47 monthsOver 10ish year I will have a total equity of 1.48M which is an average monthly increase in personal net worth of about 12,000 over this timelineOPTION 2Current home value - 425000Extra payments - 1000 (it would drop from 4k because 2k would go to the other loans principle and I would lose 1k as an expense for the extra loan)Total interest spend over the loan - 95000Resulting equity - 330000 (425000-95000)Time to pay off the remaining loan in months by paying 1k extra per month - 64 monthsNext loan amount - 405000 (450000 - 45000 10% down)Extra payments - 2000Estimated home value after 10 years - 500000 (modest evaluation)Total interest spend over the loan - 100000Resulting equity - 400000 (500000-100000)Time to pay off the remaining loan in months by paying 2k extra per month - 131 monthsNext loan amount - 405000 (450000 - 45000 10% down)Extra payments - 0 (money is being used for other loans)Estimated home value after 10 years - 500000 (modest evaluation)Total interest spend over the loan - 330000Resulting equity - 170000 (500000-330000)Time to pay off the remaining loan in months  - 360 monthsOver 10ish year I will have a total equity of 1.29M which is an average monthly increase in personal net worth of about 9,800 over this timelineI know this is very detailed and you would probably have to spend a few hours figuring this out, but If you could help me by providing some benifits to option 2 that would be helpful.Thank you