I would save up more.

Check out these two articles that provide a good overview of the factors that affect qualification and loan amounts:DSCR Loans: What Are They And How To Get The Best Termshttps://www.biggerpockets.com/...DSCR Loans: How To Use Pro Strategies To Save More And Make Morehttps://www.biggerpockets.com/...

I hope you are asking two separate unrelated questions, because there's no point in doing cost segregation for properties held inside your self-directed solo 401k, save for some very rare exceptions.Some of the Bigger Pockets experts who operate reputable costs segregation companies are @Bernard Reisz, @Yonah Weiss and @Julio GonzalezSome of the Bigger Pockets experts who offer Solo 401k administrator services are @Dmitriy Fomichenko, again @Bernard Reisz and @Brian EastmanReach out to them and see if they can help.

My former boss lived in trailer like 25 years ago, and saved thousands before buying a real home.

Another tip here is to let them bring their own linens (fairly common) so you save money that way! 

If it helps save for the next deal or you need working capital for this deal, then I'd say do it.

Some owners may misunderstand and choose to replace the pipes on their own, saving the EPA some time and money.These pipes were installed over 100 years.

@Sino U.I would save more money or look into a DSCR loan.Where is important.

With that in mind, I would save most, if not all of the cash flow until you have enough to do the renovation.   

If you are priced out of your market you can save for a house hack there or an out of state investment.