If your goal is to be an active real estate investor and call all of the shots, option 4 is your best fit.If you want to be semi-active and call some of the shots, option 3 may be a good fit.If you are looking to add real estate to your investment portfolio but don't want to be active (similar to the stock you own in companies managed by others or mutual funds that manage portfolios of stocks) then option 1 or 2 may be a good fit if you align yourself with a good sponsor.If you choose options 1 or 2, whether you choose to do that with Praxis or any other sponsor, the most important component is to thoroughly research the company.  

The new buyer then pays you a one time assignment fee (most of mine range between $3k-10k).Some folks like doing sandwich lease options (this is where you yourself are under a lease option agreement with the seller, and within the lease component it gives you the right to sublease to someone else).

Also can depreciate 1/3 of capital expenditures for building components, like new roof.  

Generally a lease option has two different components: the option (I use the first right of purchase document), and a lease agreement.

Loans can be processed from the Solo 401k at 50% of the account balance but cannot exceed $50,000.Also, Roth 401k contributions are allowable regardless of income level, thereby affording taxpayers, who would not otherwise be eligible, to take advantage of the Roth component.

We use a custom designed system with our CRM that has some automated components are lots of auto populated reminders for our agents.

How to find partners / colleagues / workersBoth are necessary components for investing abroad. 

Scott I believe is a great start as well for it helped me understand the key components and basics of house flipping.

I've seen some junky props that passed S8 in NJ, NY, CT and MA and for sure they weren't fully deleaded.It doesn't need to be brought down to bare wood, there are different techniques for different components.

There has been a relatively recent freon change and the old "R22" freon is extremely expensive (more than 10 times what it used to cost) and most newer units are designed for the new freon and the inside and outside components typically can't be old/new mix.