It is a matter of prudence.
But a couple points:
1. You must support the Resistance as best you can, as they are the hope for the future. If you want your Latin Mass, you're going to have to compromise lower and lower to get it, as long as you depend on the SSPX. The sooner you start arranging for an alternative, the better. In other words, go ahead and yellow-light the SSPX, but don't green-light them!
Green light means "all is well". Even if you choose to attend the SSPX in 2018 for pragmatic reasons, don't forget about the deep problems that aren't going to go away.
2. You speak of this ideal, awesome SSPX priest and I don't doubt your sincerity, or even the fact that he's that awesome. But he's part of the SSPX, subject to the SSPX government, which is solidly going one direction (down, down, down). Your priest can only buck the trend for so long, and then he's going to have to either tow the party line and compromise, or leave. Countless priests from the Novus Ordo dealt with this. Talk to any of them. They wanted to be Traditional, faithful to God, but also stay on good terms with Rome for as long as they could. But eventually each one of them had to hop off the fence, and choose once-and-for-all: good or evil, truth or compromise, pleasing God or pleasing man.
3. The SSPX as an organization is sinking and failing, even if you choose to attend their Masses. Beware the new orientation and ideas about Vatican II, the conciliar church, and the Pope. Some priests won't even criticize the pope anymore, not even within charitable, Catholic bounds.
You must realize that the SSPX ship is sinking. They are moving closer to the Modernist, conciliar church, and closer to Vatican II, with every passing year. Is that what you signed up for from your local Trad lifeboat/chapel? I certainly did not. I want some resistance to Vatican II, and some fighting of Modernism the mother of all heresies.
Even if you choose to avail yourself of their sacraments, you need to have a game plan for what happens after your local chapel becomes another Indult parish (or literally merges with the local Indult -- hey, it could happen -- and in fact, it probably would happen.
When the neo-SSPX is finally regularized with Rome, how could Rome allow two of their own members to fight each other? That is to say, why would they have an Indult Mass in San Antonio (approved by Rome/ the local diocese) and an SSPX chapel down the road (approved by Rome/the local diocese)? It wouldn't happen. You can't have that kind of competition, that kind of redundancy, within the same organization. One of them would have to close, and all the parishioners would be directed to the surviving location.
The conciliar church does this all the time for practical reasons. There are only so many priests, the need is great everywhere, we all have to be reasonable, share resources, etc. Parishes close all the time once the population of the parish drops below a certain threshold. Parishes end up merging.
And then there's the brainwashing/frog-boiling aspect. It whitens my hair to talk to people at my old SSPX chapel, which I've only been absent from for 3 years. The people say things I never thought I'd hear them say. They say attending or starting an Independent chapel is somehow disobedient, bad, schismatic -- even though that's precisely what the SSPX has been doing since the 70's. Even today, the local SSPX chapel is no more "regularized" than the little Resistance chapel close to me. The SSPX might be bigger and have more money and people, but that doesn't give them any free jurisdiction or Roman approval. They are still just a lifeboat. Hopping in a lifeboat to save your faith is NOT disobedient -- in fact it's the very essence of obedience. We must obey God rather than men.