Tier1 Entrepurner/Switching from 50K(NQF 4 ski to 200K route

Hi guys,
i would like to start this new topic as i have been coming across a lot of Tier 1 entrepreneur 50 K route visa holders those who want to switch to 200k route so that they are not restricted to run a skilled business which is equivalent to NQF level 4 as they are struggling to make profit through such kind of business especially after the new policies where an IT technician can not take a contract with any company or even trough consultance as it would be considered as employment which could leave to visa refusal or curtailment , we also understand that there is work around to it and language of a contract can be tailored in way which looks like like contract of services not contract for services, however still there is a grey area and eventually it's at the discretion of caseworker how it looks at it.
i am also in the same situation and any kind of advise and suggestions are welcome and highly appreciable.
so the question arises
1) i have got the visa in April 2014 ( 50 K PSW route), can i go ahead and change the nature of business which may not be skilled to NQF 4 however i am ready to invest 200k ?
2) if yes, do we need to inform UKBA that i'll be investing 200k as find more opportunities in other businesses for eg ( import and export).
what would be the appropriate approach.
Thanks & Regards