yes, these days even for a retail trader is doable easily, with self-discipline.
the general idea is very simple, $1k capital buys for example a 10s at 99.137260, you would have 86 cents left to buy spx calls with different tenors (assuming bullish, which is always the case), odte, weekly, monthly etc. some calls will win big, many will lose small, with either set profit target to exit or leave it to expiration.
even more aggressively, a 10s pays expected coupons semi-annually, you would expect 20 interest payments totalling $450+/-, pawn the 10s and spend $450 to buy more spx calls.
you still have 1k in the 10s.