Not so. That is the variable element of the access charges only.
According to the ORR, Virgin WC paid £191m in access charges last financial year. This won't be the precise number, but will be close enough for our purposes.
(source:
http://orr.gov.uk/__data/assets/pdf...il-industry-financial-information-2016-17.pdf).
The charges are made up of a 'fixed' element, a capacity charge (per train km), variable element (per vehicle km, weighted according to vehicle type), access charge supplements, station and depot lease charges. It's very complicated.
Anyway if you divide the VTWC £191m by the number of service trains it runs in the year you get an average of around £2,500 per train. Of course only approx two ninths of those are doing the 400miles or so to Scotland, with another two ninths doing approx 112.9 miles and the rest around 200 miles. Therefore if you weight the charges by train service miles the access charge for one VTWC Anglo-Scots train on the WCML would be around £4-5k
Now these are not the real figures, but it gives you an educated guess.
Then of course you will need to lease a train (or borrow the cash to buy one), power it, maintain it, staff it, buy the goodies to give to customers, sell tickets, and have a (small) management team to make it all happen. Let's assume you are doing it all for the good of society, and don't want to make a profit* You'd have a little change out of £15k per single trip if you're lucky.
* just as well, because you won't!