To be clear, a “concession” is some dollar amount that the seller pays which would normally be paid by the buyer....foregoing your commission doesn’t fit into this.What you can propose, and the listing broker needs to be on board but no reason for them not to be, is to Reduce The Price by the amount of your commission with the listing broker agreeing to reduce their fee to the seller by the same amount.If you’re looking to not do that and have the seller pay some of your closing cost Instead (a concession) then you still need the agreement , mentioned above with the listing broker, and then the seller pays some of your closing cost instead of reducing the price.If the IRS happen to ever look at this transaction in detail through an audit or anything, they might figure out the switcharoo and disallow it, but I have no idea. 

Banks won’t always check but they could, or your leases could be audited and shown to have more tenants than rentable units.

What's the best software, lists, and lead generators out there if I go the route of spending some money on actually finding these deals?

For those of you who use their software, do your run an eviction report and if so, what service do you use? 

My assumed monthly expenses at the sellers price:Taxes $170, Insurance $70, maintenance $70, management/software $110, lawncare $75, misc $50.  

For compliance, its almost impossible to sell since you need to protect the TC buyers and get audits to make sure.2) Years 11-15 - You need to continue compliance audits and ensure use restrictions are in effect to keep the TCs valid3) Year 15 - You have options.  1) Continue to operate and own the property (usual) as lIH and no change 2) Sell the property to a new operator who may do rehab/resyndication with 4% TC and continue as LIH  3) Offer it for sale as a QC (qual contract). 

Any suggestions on great software that is user friendly and excellent at keeping track of these expenses over time and for multiple properties? 

A better approach is to hire a full time onsite management team capable of performing all the duties of management, home sales, managing maintenance and repairs, and the implementation of software systems and processes that will eventually have the park running like a Swiss watch.

My background is in electronics and software, so I plan on making this happen if there's a decent market for it.

Don't worry about fancy inspection software that costs an arm and a leg and has a steep learning curve.