@Koki AgataCommon-sense precautions go a long way when DIYing lead abatement. 

In our state, Ohio, leasing has gone on during the pandemic with added safety precautions in place.

If it is a higher-priced property that is vacant and needs some repairs or a major rehab on a lower-priced property  I will purchase a Builders Risk which also covers uninstalled materials and products on site.We went for 4 years with zero problems in 46201, 46205, 46208, and  46218 averaging 80 to 100 vacant units per year but at the end of 2019 and 2020, we have had to take more precautions.

I have been doing signings throughout the past few months, and have been taking precautions, especially with signers who are over age 60.

But others take precautions to insure that your going achieve the success your seeking. 

What precautions should I take?

If they don't take adequate precaution they eat the losses.

And as a precaution, I'd recommend also retaining receipts (scan them if necessary to save on space).

Just as CYA precaution, so they don't try and sue you.

I don't know if he took the proper precautions and tested the pressure on the water pipes before he purchased nor do we know if he just let this bill just pile up after watching a significant jump.