i am from medical physics. i can say as long as there is no solution to shield radiation, there is no way to reach planets with humans further away. so even frozen embryos or cryostasis will be useless, bcz they will be damaged and or destroyed through radiation.

another point is travelling distance. you can reach high speed. but keep in mind that you need the same time for braking speed down as for speeding up. and at these velocities you need big big shields even for the smallest objects in space...

so huh... will be tough. living on mars will be possible imo. needs 200 to 300 y imo.