I've provided the management company everything they've requested (photos, videos) over 12 business days ago and every time I call or email I get told they're investigating the situation.

In any case, you need to let HUD know ASAP what your tenant did to your property,...then go after the tenant for damages...Take pictures and give those to HUD....they will investigate and if they find your story credible then they will lose their voucher. 

I'll investigate it. 

Investigate conventional finance, FHA loans, and other programs that can be in line with your objectives.Through networking, word-of-mouth, or direct communication with property owners, take into consideration investigating off-market options.

For sure, this flyer is merely a preliminary step for STR owners.

Consumers should rely upon their own investigation and inspections.

However when investigating this I see I would likely be commiting fraud. 

So, you need to investigate your state's laws to see exactly how that is done as it will vary from state to state.

Do not collect banking or financial information and absolutely do not use an online payment service that is flaunting the law by linking to bank accounts as a means of pseudo investigations. 5.

They don't bill for their time unless they win, but they do bill for court filing fees, postage, investigators, expert witnesses, etc.