In fact, there are even financial markets that specifically bet on future levels of the Fed Funds Rate (unsurprisingly called "Fed Funds Futures").These futures correlate very well with certain bond yields which, in turn, correlate very well with mortgage rate movement.

It won't cover how to set up a debt fund (that's advanced level LOL) but it'll cover all the key considerations you'll need to take when safeguarding your own capital.

I think it is best with a solo(k) to take it to the next level and work with a professional such as a CPA or your advisor, to ensure that all your transactions are proper and are not considered prohibited.

@Greg Scott had some great perspective on when TK may make sense based on our goals, experience level and how involved you want to be with your investment properties. 

The apps you're referring to are suited for hand-outs and entry level project starting points - not for official purposes - unless they can be imported into actual CAD software and manipulated (".dwg" files).

A handy search bar in the upper right makes it easy to find previous discussions, blogs, podcasts, and other resources.

Here's a high level average cash flow calc for a few different property types based on what I'm seeing.Apartment/Condo (2/3 BR, 1/2 Bath):Purchase Price: $350k Mortgage Payment: $1550/monthProperty Taxes: ~$1600/yr or $134/monthMaintenance Fee: $700/monthProperty Insurance: $125/monthUtilities: $300/monthAssume no maintenance/capex reserve since Condo. $140/month vacancy reserve (5%)Rental Income: $2800/monthCash Flow: -$134/moTownhouse:Note: Looking at low price units on the market for < 7 days to possibly get more value / minimize mortgage paymentsPurchase Price: $450kMortgage Payment: $2150/monthProperty Taxes: $1900/yr or $159/moUtilities: $300/monthProperty Insurance: $125/monthMaintenance (5% rent) + Capex + Vacancy (5% rent) Reserve: $500/moRental Income: $3000/monthCash Flow: -$232.64Detached Home - Single UnitPurchase Price: $600kMortgage Payment: $3193Even if I can get $3300-3400/month for a 3-4BR home purchased at $600k, maintenance and reserves will cause it to be negative cash flowDetached Home - Two UnitsPurchase Price: $700kMortgage Payment: $3831Property Taxes: $3500/yr or $292/moUtilities: $300Property Insurance: $125/moMaintenance (5% rent) + Capex + Vacancy (5% rent) Reserve: $860/moCash Flow: -$608.57Are any of my numbers way off?

We under contract right before thanksgiving, which I think helped give us the upper hand in negotiations.

Maybe chat with a financial advisor and have them help you set up an IRA and throw 25k directly into that on a high/medium/low-risk level and watch that slowly grow as a slush fund for further investments. 

Some have very little involvement in the actual operations of the properties, so if you are seeking asset management help, I would be sure to ask what the mentor's level of expertise is in that area.Who would I actually be working with?