Looks like spew and not a hand we should be floating with. Have a c in your hand or some type of draw or ace high or even a better Q. This is a simple and clear c/f

Plan seems ambitious but given the read I don't hate the float on the flop. It's not standard though.If he doesn't barrel turns that often we have an easy check here I think? Against guys who are aggro on flops and slow down on turns our Q high might be good here a reasonable % of the time. We can still try to decide to bluff river. I think I'm bombing river here myself, atleast 3/4 but possibily pot. I can see a lot worse calling us here and once he raises we have a pretty disgusting spot but I think we can find a hero fold.

I think if you want to exploit the tendency you described, then it would be better to choose the parts of your BB defending range which have backdoor draws enabling you to have a bluff raise range on the turn. This gives you another way to win the pot rather than hoping that your bluff on the river works after the turn is checked through.

There should be plenty of options available in addition to anything which already has showdown value. I think BB vs BTN spots where we take a float flop bluff river line will see you hero called ridiculously wide by many players as well, even those you consider tight.

I think most agree the float is too wide in theory, although exploitatively can be fine with any 2.

Plan is usually to wait until the river for our chance to probe. If he does fire the turn we known he is super strong given the reads we have and pretty easy check fold. When he checks back we stab on the river.

Can be fine exploitatively to donk turn. Difficult to say how well it'll fit as part of a balanced strategy unless the turn card is specifically way better for our range than villains.

I wouldn't donk the turn purely because of our read. Float seems ambitious and without a read I would prefer a XR than a float OOP though like already said, BD draws would be preferable.

As played the river could be a bigger bet I think as we could reasonably get called by Kx Jx or even Tx so I would be betting closer to 4.50-5.