60k is way too high for the mentioned position in my opinion.

Because of the constant delays in this project, as an alternative I would suggest the following:

30-40k salary and the rest, 20-30k (is a bonus)

Before setting up a DAO vote in order to hire him, he should provide us with targets based on the S.M.A.R.T concept = Specific, Measurable, Attainable, Relevant, Time-based.

If in 1 year, he manages to achieve everything he presented, give him the bonus. If he does not manage to achieve everything, than there is no bonus.