My partner entered the uk in may 2012 on spouse visa. His visa expired in july 2014. As we applied late we could not apply for extension. The solicitor recommended the 10 year partner route as no financial requirements were needed and due to my hubby being an overstayer - went over by 3 months ( neither my hubby or myself was working due to hubby being overstayer and was illegal to work and i had a child who was 12 months and was pregnant again) . We applied through solicitors on 10 yr partner route in nov 2014 and hubby was granted visa of 30 months in jan 2015. I wanted to know if we can switch visa to 5 year partner route although hes on the 10 yr partner route. How will he be eligible to switch? What are the requirements? Also my hubby is currently working..earning 11 000 a year..but if he does extra shifts he can be earning up to 16-18 000). Has anyone been successful switching routes this year? What were the requirements? I want to switch as 10 yr is a long time to settlement. Also if we go on 5 yr route does the financial requirement has to stay the same..will it still depend on that?
Need help as confused !!

Thank you