I will be participating with money too at the first round and would like for the group to be open to other investors that want to come in now, but also later in time.

I really enjoy how everyone participates and swiftly on these posts.

You can obtain a plan document from us (without need of a CPA, though we always encourage you to talk with your CPA about all of your financial plans) that allows your 401(k) to buy and sell real estate, have a personal loan provision, have Roth contributions for the participant, etc. 

Tax liens just give you a percentage back % which usually ends in bid down wars (@Wanye knows more about it but the general gist is other people can bid down  against you).Its after a few years of consecutive missed taxes does the property goto Tax-deed sale with the county.If you want to participate in tax-deed auctions you need a bit of money (40k to start possibly more now - and you'll need a lawyer if you intend on selling the property - have to complete the quiet title process). 

@Eric SchraderTo learn about the prohibited transaction rules, please see the following. https://www.irs.gov/retirement-plans/plan-particip...

Look forward to having you as an active participant here on Bigger Pockets!

Some projects have rental pool options where the condo owner can participate in a rental pool to generate income.

I think it is great that you've already jumped in on the forums and I hope that you'll continue to participate and get involved in the BiggerPockets community!

Thank you in advance for your consideration and participation in this great effort to save lives!

Feel free to participate and share with the group......Tell us a little about yourself !!