1. Marvellous Designer to make the cloth - unbeatable - a dream come true

2. zBrush to clean up and making adjustments - Industri standard

3. UV mapper Pro to make UVs - tried and tested for over 10 years

4. obj2cr2 for rigging - saves hours, literally days of work

How long to learn it all? 2 weeks should be enough if you are not distracted by other things. (I have just gone through the process)

All this programs are very cheap exept zBrush but there is a 30 day version - try it out.