There are 2 things that you need to take into account. According to what you say, you have an APS-C e-mount A6000 and you would want to
1- Buy a 300 USD LAEA-5 adapter
2- Buy a DSLR full frame lens of 400 USD
Well I think you make multiple mistakes here.
The first one being that the LAEA-5 won't bring you no advantage against a LAEA-3 on your A6000 body
Second would be, why would you use FF 24mm or 28mm which would give you an equivalent of 36mm to 42mm field of view ? And moreover they are heavy DSLR FF lenses.
You would shell out loads of money that you could p