@ indus yes.
@ the OP, really in theory you could probably do as you wish and provided your prop things correctly and do it all in the right order (not to mention getting some humongous chunks of timber into your loft (on your own presumably) and then manhandling them into position) however this isn't really something you should be just having a bash at as you've got a bit of time off. Your attitude (no offence honestly) and lack of respect for what you are proposing to do has probably deterred others from posting/helping.
@ the OP, really in theory you could probably do as you wish and provided your prop things correctly and do it all in the right order (not to mention getting some humongous chunks of timber into your loft (on your own presumably) and then manhandling them into position) however this isn't really something you should be just having a bash at as you've got a bit of time off. Your attitude (no offence honestly) and lack of respect for what you are proposing to do has probably deterred others from posting/helping.