I believe every deal is made by meeting some percentage of needs on both sides. 

For cash buyers in South LA where would your percentage be to purchase when it comes to a higher end ARV in a pandemic through all the Buyer scares out there?

Typically the "passive investors" still get the depreciation "paper losses" passed to them based on their ownership percentage in the property owning entity.

The seller had to pay a percentage amount on the sale price, so in a way, they paid less in commissions.

Find out the real percentages, the real costs, the real comps, the real expenses, the real numbers.

(IRR is the percentage of interest you earn on each dollar invested in a property over the entire hold period.)Generally, when you invest in a syndication, the equity split (meaning, the cash flow that the property generates, and the proceeds from the sale of the property) between general partners and limited partners is 70-30 or 80-20, where the investors receive the bulk of the funds.During the hold period of three to five years, you’ll receive distributions from the syndicator, including your share of rents and income.

., If they beat the deadlines they can earn more interest in the deal and if they don't meet deadlines their ownership percentages decrease).You do not want them to suddenly get a big job, and then your investment (and money) becomes their side project.They MUST have some skin in the game.

The Solo 401(k) also has the advantage of being more favorable for real estate investments using debt-financing such as a mortgage - as the 401(k) is exempted from a small tax called UDFI that an IRA would pay on the percentage of income derived from the borrowed money.So, as you continue your research and get feedback here on BP, think about what type of program will best suit your needs and be sure to ask questions along that line.

I'm not the one to necessarily offer an educated opinion on the percentage, but I concur with you that your sweat equity brings value, and you should make that argument to your potential partner in negotiating a bigger piece of the pie.  

A percentage of that (say 40%) is what’s left to service your debt.