In this market there are cabins on their own land and cabins on leased forest service land.

Structuring the Deal with a PartnerWhile your partner cannot directly participate in the loan, there are ways to structure your arrangement to reflect your 50/50 partnership:Option 1: Post-Purchase Equity SaleYou obtain the 203(k) loan in your name as the owner-occupant.After closing, you sell your partner 50% equity in the property via a quitclaim deed or similar legal instrument.Your partnership agreement would outline each person’s roles, responsibilities, and share of profits.Note: Be mindful of FHA’s rules around title changes and ensure this doesn’t violate loan terms.Option 2: Partnership Contribution AgreementYou both contribute to the down payment and renovation costs as outlined in a partnership agreement.Your partner’s contribution could be recognized as a share of the equity in exchange for funding, services, or property management.The partnership agreement would detail how profits, responsibilities, and equity are split.Option 3: Joint Venture AgreementStructure the deal as a joint venture, where you own the property personally (required for the FHA loan), but profits and roles are split per a formal agreement.Your partner could receive equity-like compensation through profit-sharing without being on the title.3.

I’m in the La Jolla area, but service all your targeted locations.

The city of Chicago has made a huge push to get rid of any lead service lines, so it's no surprise you have to mess with that.   

@Chris Clothier I believe this gentlemen could possibly be interested in your services. 

.: I would only buy single family homes in the best locations I could afford rather than messing with multifamily and less great locations, and I would use my local credit union for loans because they keep them in-house and service them in-house, so that I wouldn’t have to deal with loans being passed around among all the sketchy loan servicing companies.  

Is it segregated (only my funds in the account)- do you have an attorney on staff that reviews exchange docs and keeps them current - what is the typical time for your staff to complete an exchange ( you want to get a feel for if they are understaffed and can they get the work done on your time frame)- how many exchanges do you do a month- what is your errors and omissions insurance through, can I get a copy- what is the amount of your fidelity bond - for each occurrence- what protections are in place to prevent wire fraud- will my funds be used by the company for outside investments (goes back to the type of account funds are held in)- who will be my contact during the exchange (goes to customer service, you want one contact who you can reach by telephone)Investors should keep in mind that it is their money they are placing with a QI to hold for a short period of time and be sure they feel comfortable with the company they choose to perform this role. 

Therefore right now I'm considering using a service for submetering and then billing separately (currently I live in the ADU and rent out the main house).Does anyone have experience with this? 

So far I have not had good customer service. 

I hope you are asking two separate unrelated questions, because there's no point in doing cost segregation for properties held inside your self-directed solo 401k, save for some very rare exceptions.Some of the Bigger Pockets experts who operate reputable costs segregation companies are @Bernard Reisz, @Yonah Weiss and @Julio GonzalezSome of the Bigger Pockets experts who offer Solo 401k administrator services are @Dmitriy Fomichenko, again @Bernard Reisz and @Brian EastmanReach out to them and see if they can help.