Don't take proceeds and roll it all into the house.

Hope you will be able to roll your profits into the next flip!

It seems pretty straighforward and a sensible question.I'll be investing starting in August when I have access to my employee 401k, which I will roll into the Solo 401K I have set up.

You need the p and Ls and rent rolls to determine that.

Alternatively those funds can be rolled over into self-directed IRA (this would not be taxable event) and in turn purchase vacation rental or any other alternative investment. 

The exterior, the interior, plumbing, electric, HVAC... everything. b) Rent Rolls and Leases  This is where the information provided by the landlord is going to matter.

After selling an investment property, OZ real estate investors roll only their capital gain into an OZ investment, and then have the flexibility to consider other investment options with the remaining proceeds from the sale of their property. 

maybe, if your partner rolls over, but not if they disputed it.

The cap rate with the current rent roll is 11%I’ve agreed to contract at 365,000 with seller paying 3k in closing

sell everything and roll it into a small or mid size apartment this is what most that want to be life long landlords end up doing.those that own lots of doors tend to have many paid for in cash..