@Amit Gandhi Here's an article with things to consider when selecting a cost segregation company.

Hand-written letters, postcards and letters for people you've contacted.

What has you experienced been for people who have done this or are currently allowing this in your properties?

I currently have 4000 people on my email list.

Interested to see what other people think about this.

@Saravanan Varadan Here's an article with things to consider when selecting a cost segregation company.

Many people who sell say the reservations transfer but sometimes you don't want those bookings.

Sometimes people freak out more than is necessary with galvanized.

If you have any doubt about it being occupied or not you could put a notice at the door and say that its your property and that you will enter on a given date.You probably should provide a phone number so people may  call you. 

This is where having local experienced people to over see your rehabs a big value.Best of luck.