Talk to the code officer ahead of time and explain what you are doing and you want to do everything right. 

The seller may come back with a counter, go ahead and let them know that was truly your best and final. 

There’s usually many phases to construction, so I’ll ask for payment upon completion of each phase such as painting walls, drywall installation etc, or near the end of the week when I need to pay guys, but my work stays ahead of the customer’s payments.

Good morning Miles, I went ahead and sent you a direct message.

vacancy is an imaginary cost that you estimate upfront to ensure your investment can sustain itself and actually make money. you do not need to put aside any amount of money every month, as long as you have a reserve account with enough to cover your mortgage payment when the time comes. to make life easier, some investors will put this percentage aside every month to fund their reserve account, but it truly can come from your pocket, a line of credit, or any other vehicle you use.

And if the rental income is still compelling, considering the worst case scenario of 50% back, then move ahead with it.

I'm looking to BRRR with as little down as possible but I'm concerned about the "seasoning" period lasting at least a year and slowing me down from getting deal number two.Maybe I'm getting ahead of my self and but it's difficult not to look beyond the first buy! 

Once you've beat it to death and chopped your numbers in half, then in half again, if its still a viable angle - charge ahead. 

Thank you ahead of time!

I would keep working the numbers backwards from where you want to be, and ROI needed in regards to the contributions to the vehicle you are using to get there.