Living off the system while making no "real" contribution....

Put EVERYTHING in writing and set time deadlines for each and every stage of the remediation work they are contributing.

As an owner-only business retirement plan, the Solo 401(k) has higher contribution limits, allowing you to build your savings on the front end as well as providing investment flexibility.

If they aren't, you don't have to do the deal - so you put them in the position to decide whether to value your added contribution or not.  

Second, its generally not advisable to put a rental into a S Corp.Honestly, I'd assume that dissolving the entity would amount to taking the equity out as an owner's draw, the reverse of doing a contribution. 

Let me know what you all think BP.On Dec 15-17, 2020, a Global Real Estate Conference will honor the extraordinary contributions of a few leaders in the real estate industry at the Mirage, Las Vegas.The conference will bring together the world’s most renowned architects, brokers, developers, property managers, and design professionals to explore the latest developments and celebrate extraordinary achievements in all realms of the industry.Over the past few months, the conference’s research wing reviewed hundreds of individual profiles to shortlist deserving individuals for a major leadership award.

The notion of over payment is subjective based on opinion.

In addition, if you are self-employed with no full-time employees you may wish to consider opening a Solo 401k instead of a self-directed IRA as it has several advantages over an IRA LLC such as much higher contribution limits, direct checkbook control (i.e. no need to have the account at a specialty trust company), ability to take a 401k loan, exclusion from unrelated debt finance income tax with respect to investment in real estate acquired with non-recourse financing, etc.In addition, please note if you purchase debt-financed real estate with your IRA, unrelated debt finance income tax should apply to the income attributable to debt-financed real estate held by your IRA.

I can't wait to learn and contribute.

Think about what you could contribute and that will lead you in the right direction.