HELP with Hoader Home rehab !!!!!!!!!

[PJ Singh]

Hi BPer's

I am new REI in Houston TX and I am currently under contract for my first major rehab project. 

Project: SFH: Its a 1400 ft2, non-flooded , single story ,3 bed 2 bath, 1983 built in clear lake TX area zip 77062. It is a hoarder house with 6 ft hole in roof. Seems like this house has been neglected for quite a while. Below are the details for house. 

Purchase price : $80K

Major Rehab: $50 k 

ARV: 170K-175K

Rent : $1600/month

Rehab: Based on quotes I received from 3-4 contractors: new roof, foundation fix, sheet rock, new flooring, landscaping, new bathroom, kitchen, siding. Its a full rehab work. 

Question : Since this is a hoarder home, its not possible to see walls. Is there a possibility of structural damage ( stud rotting) due to rain pouring in through hole in roof? 1 of the contractor brought it up.  

Any other damage , which I am missing? 

I would like to hear from someone who has worked on hoarder homes and/or big hole in roof.

Thank you in advance for help!

[Matthew Paul]

Lots of dumpsters and dump fees