MMEX is already DOA, an insolvent chuck of toxic debt.
None of these small, hobbled topping units or refinery proposals are going to gain traction, with the exception of one, maybe two very specific cases.
MMEX, Raven, Duke, etc. are all failures out the gate - they have been proposed by scammers who simply don't understand the refinery business, its relationship to the upstream/midstream sector, or how a refinery must be run to operate at a profit.
Refinery economics dictate a few conditions for operating at a profit; scale, throughput, feedstock flexibility, and very low transportation costs. Stable operations that support balance in the gates, while dealing with imbalance conditions outside the gates, and the ability to tweek product mix are also critical.
MMEX, Raven, etc. all lack these characteristics, and investors have sophisticated technical and market analysts that understand this. This is why they will fail to obtain sufficient financing to be built.