By "cover 80%" I guess you mean by funding it not borrowing the money, the title is throwing me.If that's the case, form an LLC, make the money contribution to the company, admit the other members with their contribution and buy the property.This will keep you away from acting as a lender.Your security is in the company operating agreement, you won't need to file a deed of trust.

Contributions to the Solo 401k must come from the business or self-employment activity that adopted the plan.

I hope that I can contribute as well in the near future.

Between you and your wife, the payroll and profit sharing contributions could total up to around $50k for each of you.

Building advantages: Substantial savings vs continuously poured foundationMuch less framing material needed due to post frame designLarge wall cavities permit insulation of R30-R40 in the walls and R50-R60 in the ceilingRadiant flooring can be economically installedLeads to very high energy efficiency with utility savings of 20-40%Conservation of building material, reduced energy usage, and minimized disturbance of soil all contribute to "green" aspectVery rapid build time of 45-60 daysCan build through winter with no issues (slab can readily be poured inside framed home)Metal roofs are highly resistant to hail damage, and insurance cost is normally lessExterior is 100% maintenance free and will last for decadesStructure design has very high resistance to damage from wind, seismic, and snow loads (superior to stick-built)Free-span structure facilitates open interior spaces, cathedral ceilings, and stylish loftsExterior can be accented with stone, brick, and other materialsStylistic external use of masonry accents, dormers, gables, and waitscoting provides attractive appearanceMaintenance free aspects and one-level living could be very appealing to seniors who are downsizing, particularly in structured communities with some common walking areas or other inexpensive amenities.So there's some more color.

We ask that you contribute $3 if you attend to defray expenses.

I would suggest you listen to all of the podcasts and that might contribute to your direction.

I'm a relatively new private investor and have begun experimenting with the crowdfunding sites, to get into a wider variety of deals at a lower contribution if the terms and restrictions turn out to be viable, or at minimum to 'see' more deals.Below are my quick findings about several of the sites as of 11/1/13.

Have your properties inside an entity, might be an LLC, then admit members to the LLC, they can contribute to their capital account, some day they may be able to exchange the capital for assets held in the company.

My situation is limited cash, sizeable retirement accounts (for my age), and wanting to minimize having to touch retirement accounts (ie, backing out Roth contributions, taking a 401(k) loan, etc.).