Surface-level calculators were not enough.
Early tools helped me get quick numbers, but they did not make me confident in the assumptions underneath those numbers. I needed a better way to pressure-test the deal.
About InstantlyAnalyze
Built by an investor who learned the hard way that tiny assumptions matter.
My name is Ben Penwell, and I am the founder of InstantlyAnalyze. I built this product after realizing how easily one missed assumption - property taxes, vacancy, rent, or rehab timing - can change the outcome of a rental property deal.
The story
I wanted to invest in real estate, but the path felt inaccessible.
Like a lot of people, I started by listening to podcasts, reading BiggerPockets, and trying to learn from investors who were buying in creative ways: out of state, remotely, and in markets that looked more approachable than my own. That opened the door, but it did not make the actual underwriting easy.
My first step was picking a market. I spent hours researching and eventually landed on Louisville, Kentucky. Then came the harder part: finding a deal, trusting the assumptions, and deciding whether the numbers were strong enough to move forward.
On that first property, I made a mistake that still shapes how I think about real estate analysis. I did not fully account for how the property tax bill could reset after purchase. The deal looked better at the surface level than it did after that assumption changed.
The lesson
A deal does not fail because of a spreadsheet. It fails because the assumptions were wrong.
Property taxes, vacancy, rent, repairs, financing, and timelines all look small when they are just input fields. In the real world, any one of them can turn a promising rental into a deal you should have renegotiated or passed on entirely.
Spreadsheets gave me control, but cost too much time.
I went back to spreadsheets because I could build the stress testing I wanted. The tradeoff was obvious: every serious deal still took hours before I knew if it deserved more attention.
Value-add deals made the gaps clearer.
An off-market opportunity taught me how much vacancy, rent timing, and rehab assumptions matter. My first BRRRR in Mobile, Alabama made scope of work and value-add planning even more important.
Why this exists
InstantlyAnalyze is the tool I wanted before I bought.
I built InstantlyAnalyze to make real estate underwriting faster, clearer, and more honest. The goal is not to make every property look like a good deal. The goal is to help investors see the weak assumptions earlier, compare the tradeoffs, and decide whether to buy, pass, or renegotiate with more confidence.
Today, that means rental property reports, rent estimates, market scanning, BRRRR analysis, and AI-assisted underwriting workflows. The product is still improving, but the direction is simple: reduce the busywork and make the important assumptions harder to miss.
Where it is going
The next step is more practical AI for real deals.
We are working toward workflows that can review property photos, suggest rehab paths, generate scope-of-work drafts, and scan markets for deals that match your buy box.
Some of that is live today, and some is still in progress. I will keep sharing real deal breakdowns and lessons as I use the product on my own investing decisions.
Underwrite the next deal with fewer blind spots.
Start with a free rental property analysis and see how the numbers change when the assumptions are easier to inspect.
Start a free analysis