Not saying that this is the case but that is the darkside of the Web 2.0 world we live in today.

Look into the homes history on your county's web site(s). 

I think you should at least get all your finish material pricing figured out first by going to the material stores and also getting quotes. 

The second branch of the site will be a platform to create a personal web page that will hold all of the agent's social media link (kind of like linktree).

I-if it's "big expense", I get ahead of this issue by whipping out a receipt book (you can buy one at any store like Target, Wal-Mart, Staples, Office Depot, etc) and jot down the work that was performed, materials, hours, amount of people, other expenses, etc.

First, the UI is pretty good on both web and app versions.

I want to put in place some incentives for new tenants and want to know if anyone on BiggerPockets has done something similar.Here are a few ideas I have had:First Month Free: Sign a 13-month lease and get your first month freePets: No pet fee for the first 6 months, year, etcRent Discounts: Offer a discounted rent for the first month or two fortenants who sign a pre-lease agreement before a certain date.Waived Fees: Waive application fees, administrative fees, or securitydeposit for tenants who pre-lease.Free Utilities: Offer to cover utilities such as water, electricity,or internet for a certain period for tenants who sign a pre-lease.Upgrade Packages: Provide upgrades or amenities such as free parking,access to a fitness center, or a smart home package for those whopre-lease.Gift Cards or Vouchers: Offer gift cards or vouchers to localbusinesses such as restaurants, cafes, or grocery stores as a signingbonus.Flexible Lease Terms: Offer flexible lease terms, such as shorterlease lengths or the option to renew at the same rate, to incentivizetenants to pre-lease.Refer-a-Friend Program: Encourage current tenants to refer friends orfamily by offering them a reward if their referral signs a pre-leaseagreement.Early Move-In: Allow tenants who pre-lease to move in a few days earlyat no additional cost.Guaranteed Parking: If parking is limited, offer guaranteed parkingspots for tenants who sign a pre-lease agreement.

OCF provides an online web portal to view and track all the rental income and PM managed expenses per property.

Also, note that a lot of the home improvement box stores have a credit card with 0% for 6 months. 

Do you research first though, as you can find their criteria and proximity to other stores and competition to vet your space against.