File it electronically, and the IRS offers FREE eFiling of extensions via one of its partnering companies.If you owe the IRS money - there is NO EXTENSION!

Feel free to reach out directly with any Q's

If he is bonded, you can try filing a claim against his bond.Feel free to PM me this contractor's name so I never use him lol.

Feel free to add me to your network!

These are often either free or have a small membership fee or a nominal cost and you can meet great people and often source some great deals and get the names of good connections at these types of meetings.

Since you requested any book recommendations, I wanted to point you towards Tax Free Wealth by Tom Wheelwright. 

Pros get:Unlimited analysis calculator reports, rental price estimates, and rehab estimatesAccess to discounted educational bootcamps ($225 per course for Pro members only)Free property management software from RentRediFree off-market deal finding tool from InveloAccess to the pro-only forum in our community Access to exclusive pro-only video content like workshops and webinar recordingsLawyer approved lease agreement forms for all 50 states – $99 value per stateIf you are sure you want to cancel before the auto renewal, you will lose access to this exclusive content!

Since they only require a minimum of 3.5% down it wouldn't eat up all my funds, which could be used elsewhere in other projects/rentals, and on top of that I could pretty much live rent free with even some positive cashflow.

Feel free to reach out if you have any questions, happy to help

These are free and a great place to have your clients leave reviews for your business.