Project and Quote numbering scheme

Hi!

My system is set to restart numbering each month and I would like to have it continuous, no monthly restart but a unique ID number and have it set to start from a 5 digit numbering scheme (eg 18256).

Can I use the same numbering scheme both for Quotes and Project? (eg Quote 18900 <Q18900> when is confirmed to turn into Project 18900 <C 18900>?

Is it possible to have a Project without a Quote with the following ID number (eg C 18901)?

Thank you!