Your snake will never get 25'. 25' is a lie, no snake has ever been that big or close. The largest on record is 22' 9", that's beyond rare, expect a max of 18-20 if you're lucky, more like 14-16 as a female.
Because... Jay is accurate and correct in his information. You don't need to power feed the animal or feed it heavy. I'm sure snakes stay 10-12 foot in the wild and breed and produce. Retics don't have to be monsters unless you make them as such.
If a 10'+ animal is too much for you alone, retics are not for you.
I handle every animal up to my 18' 140lb tiger alone every day (someone is nearby, but they don't help).