I wasn't trying to call you out. Here's a real budget from 2012 at the University of Oregon, which runs a pretty average D1 tennis program in a Power 5 conference:
https://uoregon_ftp.sidearmsports.com/pages/athlfin/FY2012-Budget-Breakdown-Programs-Departments.pdf
Men's tennis team budget:
The women's tennis team budget:
So, for the men, it came in around $460k and for the women, around $600k. The difference is mostly in the scholarship money, as men are limited to 4.5 scholarships by the NCAA, while the women have 8.
Even accounting for cost increases from 2012 and "bigger" programs, I don't think we are looking at north of $750k, even for a top tennis program.
For example, disgraced coach Michael Center, who led the University of Texas men's team (which won the last NCAA team title) had a salary of $232,338. Let's say the Texas operating budget for men's tennis last year was double that of Oregon, $210k. And that cost of scholarships was $250k (verses Oregon's $159k in 2012). The total then would be around $692k.
There are a LOT of tennis programs out there that operate on a lot less than $500k or $700k.
I played for an NAIA school in the 90s. I think our coach made around $50k, and he had other duties aside from coaching. Our equipment budget was really low... like around $200 per person. We had a deal with Pro Kennex for racquets (we got them for around $30 per frame - I usually bought 3 per year) and Alpha for strings (no idea the cost, our strings as players were free). We also got one pair of shoes from the school, two shirts, two shorts, and a warm up jacket. For travel, we drove everywhere in vans. We usually stayed in the Embassy Suites because of the free breakfasts and evening reception, 3 to a room (4 rooms total for the team, plus coach). Daily meals were per diem at $15. We usually ate at buffets like CiCi's Pizza or cheap fast food like Taco Bell. For scholarships, I think I was getting around $2,000 per year (subsidized by additional academic aid and a part time school job). I'm sure the entire annual budget for our team was less than $100k... probable more like $75k!