(you need to think whats fair to both guys and you don't want to give everything away either).Now for your % of sales profits, the sales price is directly related to:market conditions (uncontrollable) = RISK,Property management results (controllable by the property manager) = RISK to you because YOU are not the manager.It seems logical (to me) without any other information though, that 50% / 50% would be fair here.As far as LLC control regarding decisions 50% / 50% with some method to break a tie vote if that ever happened.There are a lot of other things that come into play in this, and it's best to have an attorney draft up your agreement and walk you through all of the decisions that need to made on this.That's just a quick off the cuff discussion, an illustration of what could be possible, (you really need to figure this out for yourself, and with an attorney, because this is BIG MONEY over time, and also talk to your CPA because the decisions you make could have adverse tax consequences for both of you if your not careful).Good Luck!

I rape the forest.. i develop and am a big band developer and of course I boot poor homeowner out of their homes.. so i just decided to say Like ( airline pilots)  I sell Florsheim shoes  LOL..  

@Vera Berishaj you can get an 80% LTV Heloc through Pen Fed on a rental property if it is held in your personal name and not an LLC, and you have 3 properties or less including your primary residence. 12 year draw, no closing cost unless a physical site visit appraisal is required, if the LOC is closed within 2 years they back-charge you for the opening costs ($400-$600), rate is variable tied to prime + 1% and you choose p/i or i/o payment.

Are you tying up money, hope not much for the option.  

The way we work with a slate roof is simply to remove all the slate from the section of roof where the solar array will go, then tie in to the trusses/rafters with standoffs and either use a rolled asphalt surface or a rubber membrane to seal the portion of roof under the panels, then replace some of the slate around the edges so it's a seamless transition from slate to solar.

Think of this like the shoe manufacturer who owns a factory to make his shoes. 

I dont think tying up that much cash into a property without positive cash flow would make sense.

So if there are any tips to get search to provide anything useful I'm all ears.OP didn't mention what your time horizon is, how long do you want your money tied up? 

(65 vs 95 makes a big difference in strategy)Why are you tying up $300k in a home for your mom?

I'm sure the seller just doesn't want you to tie up her deal.