@Lucas LeBlancTo learn more about the solo 401k loan rules, see the following:https://www.irs.gov/retirement-plans/retirement-plans-faqs-regarding-loansAlso, following are the similarities and differences between the solo 401k and the self-directed IRA.The Self-Directed IRA and Solo 401k SimilaritiesBoth were created by congress for individuals to save for retirement;Both may be invested in alternative investments such as real estate, precious metals tax liens, promissory notes, private company shares, and stocks and mutual funds, to name a few;Both allow for Roth contributions;Both are subject to prohibited transaction rules;Both are subject to federal taxes at time of distribution;Both allow for checkbook control for placing alternative investments;Both may be invested in annuities;Both are protected from creditors;Both allow for nondeductible contributions;Both are prohibited from investing in assets listed under I.R.C. 408(m); andNeither may be invested in your own business. 

I'm not sure where to even start to look at these multi-family homes and the process afterwards and maintaining it once done.

This one also charges $20 to attend.Revealed: Our Simple, Proven Formula For Raising Private Capital For All Of Your Real Estate Deals – with Special Guest Kendall Stock of Sage InvestingSage Investing will be bringing a unique approach to the San Diego Investment Club.

Something that's updated like a Yahoo Finance stock graph?

That has to be balanced by maintaining healthy cash reserves, having enough equity to withstand market fluctuations and rental property issues, and your ability and willingness to grow. 

We have a couple of rentals, a primary residence, and stock options from my husband's job.  

I want to use my tax return to invest in some real estate stocks or real estate trust funds, any suggestions?

One thing you mentioned was success in trading stocks and real estate but the problem i find is both require capital.

Like, adding stuff about maintaining the yard or whatever?  

Those investors even if they have zero experience tend to have lot's of money from their executive jobs, businesses they own or have sold, stocks,etc.