Over estimate the costs and not need them?

It saved my quite a bit on interest costs.

You are adding costs and complications for no benefit at all.

For your first BRRRR, plan for extra in your rehab budget—unexpected costs happen.

It will be a 5/1 ARM though.If you want to lock in a 30 yr, but with a little higher costs, I've used LimaOne and Visio in this area. 

Hi @Alex Lee I would avoid 203K loan and work with conventional renovation loan based on knowing you'll be forced to use 203k certified contractors which will cost more money and offer inflated pricing because they must follow 203k guidelines. 

Additionally, S-Corp compliance costs (payroll, tax filings) typically range from $1K–$3K annually.

You’ll want to look at expenses that others have mentioned such as pass through entity tax, education, networking, any start up costs, etc.  

You still have to be careful with the experienced ones as some like to sugarcoat everything - just spoke with an investor 2 days ago that has a property under contract here and the agent was underestimating rehab costs and overestimating the rents. 

We currently work with many clients who do Cost Segs and using that STR loophole!