Based on the value of a property you can likely get away with a inexpensive desk top study such as condos and you will require a more comprehensive engineering study for larger properties like a 4plex.Desktop / modeling options are sometimes good for smaller residential like you mention. 

Personally I think it should be a legal requirement for the reasons detailed above, showing comprehension for the legal contract there entering by proving consideration and thought has been made for potential exit and dissolution of said contract. 

This book was released in 2019 but I found it to contain a lot of great information on voucher programs.https://www.amazon.com/Subsidized-Comprehensive-Government-F...

Based on your comments and negative statements it’s clear that the strategies and concepts that a Tardus teaches is beyond your level of comprehension.

https://propertygrid.com/Someone told me about it and it uses blockchain technology and tokenization of ownership with the purported goal of enhancing the real estate transaction and opening up global markets.

Here’s what I recommend:Cash Investments:No Debt, No Stress: With cash, you avoid third-party control and loan vetting, giving you full control of returns.Equity Builders: Partnering with builders often reduces your property entry cost by up to 20% below market value.Consistent 10% Returns: With an all-cash approach, achieving 10% ROI is realistic and efficient.Financing Strategy:If cash isn’t feasible, consider a balanced financing model:40-50% Down Payment: Keep leverage manageable while maximizing returns.Lower Debt Exposure: A conservative loan-to-value ratio (LTV) reduces risks and keeps returns stable.Work with a Builder: Collaboration with builders can lower acquisition costs and increase your ROI.Key Takeaways:If possible, prioritize cash for simplicity, control, and consistent returns.Financing can work well with a disciplined approach to debt and a strong underwriting process.Partnering with builders offers opportunities to reduce costs and enhance your portfolio’s profitability. 

This is particularly effective when paired with bonus depreciation provisions.This method not only helps reduce your tax liability but also enhances cash flow, making it a powerful tool for real estate investors looking to grow their portfolios.3.

I've been using Avail to generate leases and collect payments from guests for my MTR but I don't think it has comprehensive enough features. 

With a $25,000 renovation investment, we modernized and enhanced the home’s value.

you guys may  want to read this very thorough comprehensive post with tube videos to back it all up.https://www.biggerpockets.com/forums/92/topics/522621-morris-invest-review-after-8-months-of-ownership?