if u want to be able to produce such kinda of stuffs ALONE, then u'll need AT LEAST 2 years to be ready. as u already know, things like that take a lot of time. Also is that last one a WIP?? the kind of work that u'll deliver depends totally on you. take for example a short named alarmclock (by two koreans, i guess)- if u take a look at it, u'll be blown away by the quality and standard they've maintained. so wht i'd say is 'yes, u can do it' and also 'u need time'. as Maya is a production/movie based software, used in most hollywood studios, yes u can do that kind of things but u'll have to be on that level too. so my suggestion would be - take intensive 2 years in Maya. Also you'd be better off with a partner/colleague- two head is always better than one.