Question

Can an object with mass be accelerated to the necessary velocity collapse under its expanded and increased mass, thus creating a black hole?

Answer 1

I guess not. On top of increasing your mass, velocity elongates you in the direction of movement, and that increases your volume and lowers your density. You will never get dense enough to become a black hole. It's interesting, though: such a relativistic black hole would be a full size black hole (with all kinds of catastrophic effects) only if looked at from the proper direction and, at the same time, it would look like a perfectly normal place if looked from within!