Quote from @James Zobrisky: What is everyone's best advice for where to store your cash flow.

I inherited a partnership in a 22 unit commercial building with 8 restaurants, a grocery store, a couple of personal care services, and various other businesses.

That is like walking into the store to buy juice that is for sale for $5 and paying them $7 for it because you want to pay more than what the juice is worth.

Buy some 5 gallon buckets with lids.Buy the following and store in buckets or 2 liter bottles.50 lb bag chickpea or garbanzo beans     50 black beans. 50 pinto beans.       50 rice50 Idaho potato50 red potato50 onions50 carrotsBulk pasta, or make it yourself(cheaper but a lot of work).Meat:Large spiral cut ham 20 lbPork tenderloin- 20 lb cut into boneless pork chops.Cheapest roast 20 lb.

Also available on all your favorite places to listen and buy music online 😅 

Without the tenant explicitly stating (preferably in writing) you can trash whatever is left, you likely have a requirement to store items left behind. 

But make sure to check out the BP book store here also.

Manage their properties Provide welcome gifts/ goodie bags for their guests before check in Hauling extra supplies/ misc items to return to stores or other properties--Any other ideas that I can pitch to make myself more marketable?

When you are the listing agent your name is on the online advertisement and your sign is in the yard.

I have this issue with Buildium for all the online rent payments received through their payment app.