If you purchase at least as much as your net sale you'll defer all tax. 

Payments that you make normally fall into one of 3 buckets100% of the payment can be factored in somewhere on the returnPartial payment can be factored somewhere on the return0% of the payment can be factored in somewhere on the returnHouse-hacking also has considerable tax implications in the event that you want to sell this property.You can potentially defer a portion or all of the gain on the investment property with 1031 exclusion.You can potentially exclude a portion or all of the gain on the personal residence with section 121 exclusion

I'd suggest hiring a professional or really digging into this yourself.My background: over 8 years in environmental consulting (13-present), 6-7 yrs doing floodplain development permitting across the country for telecommunications, commercial real estate, and oil & gas.

You'll need an architect to prepare the plans and help you prepare and give the presentation to the town for your building permits. 

If they meet all that and the references check out, it’s an automatic application acceptance and I present them with a lease.

Always buy below value and never be afraid to jump on an opportunity when it presents itself even if its out of state.

The reason why I am doing solo 401k is for the following reason:1. defer more taxes by contribute as an employer as well as employee2. able to borrow against my own solo 401k account and pay myself interestEmbarrassingly I am stuck with a few questions to open this solo 401k account.

When I present a deal to my hard money lender I always give them comps (bc im a realtor I do it), who I plan to use for subs, a timeline, arv, etc.

Hey @Matt Parker, I'm not sure if you have seen the inside of the units yet but there could be a lot of deferred maintenance. 

It is the valuation that will be important as you need to purchase at least as much as your % of the sale in order to defer all tax.