Is there anyone out there who is currently using funds from their solo 401k to invest in real estate?

Does anyone know if there are crowdfunding sites specifically tailored to land development ? Looking to raise on a new project and need some ideas on where to tap into private investors , a lot of the sites are not al...

I would like purchase a multifamily property using the HELOC funds as a down payment.

Refi it and take the cash and use it to pay the note off on the other one and supplement those funds in a 1031 on the sale of the other one. 

I have both partnered with my parents where they put up the funds and we (brother and I) do the work of the rentals.

If I did only do 5% down or even 10% down when I purchase the home will a lender require any additional funds when I refinance or do they only look at what I owe on the home and what the appraisal value is?

No need for her to be on the HUD as she's not doing any funding for the purchase of the home. 

I am willing to do manual work (summer time) or partially fund a deal.

Or to pay it off with my own funds to make the money faster?

Currently, we are looking into a rent and hold due to the lack of funding for renovations.