@Rob BlockI did a material amount of research into this earlier this year.

-Contractors not performing, low appraisal, unforeseen renovations, finding a deal that works, offering the right price based on financing and timeline, materials selection, contractor management, contractor vetting and selection, contractors contractors contractors...This is not an easy game to buy and hold multiple units.

I'm working with a reliable contractor and investing in quality materials for the master bathroom, kitchen, and guest bathroom renovations, which I hope will position the home for potential insurance discounts.Benefits of Lower Insurance CostsBy strategically planning and executing renovations during the remodeling process, I'm hoping to lower my insurance costs and save money in the long run.

This status is achieved by materially participating in your real estate activities.

There is also coverage for materials In-Transit & at temporary locationss as well. 

I have already read Rental Property Investing by Brandon Turner and I'm looking for new material to read.

No commercial business owner wants to own the building when they can triple net lease and instead just pay for furnishings, taxes , insurance and maintenance.The ConC return on a triple net leased property is far higher than on a property owned by the management company.Passive investors can still take advantage of accelerated depreciation and cost segregation thru material participation of new construction of a STVR home. 

.- Did you materially participate?

There is a lot of material on the topic. 

For materials and/or services for any of my investment properties where the contractor/person does not give me a receipt, I do one of two things:1).