Double Point Precision Questions (Large open world games)

  1. Since apparently it is to difficult even for Epic to implement double point precision in the engine to support very large open world games, I figure I wouldn’t be able to do so either, therefore is there a reasonable alternative solution I could implement instead? If so, are there any in depth tutorials anywhere on how to do this?

For those with knowledge of programming & or hiring a programmer:
2. How much as an estimate, will it cost to hire someone to implement double point precision or alternate solution (so a very large seamless game world can be utilized(We’re talking multiple planets) for an MMO?
3. How long would it take as an estimate, to implement double point precision or alternate solution (so a very large seamless game world can be utilized(We’re talking multiple planets) for an MMO?