Keep mind there is minimal data, more research and larger studies are needed!
Downfall of the gel would most likely be poor efficacy due to issues with absorption and would not be as potent/effective as ICI as it is a given if dosed properly you will be rock hard as in sporting a titanium erection!
No harm in giving it a go if you are willing to up the money!
EAU Guidelines on Sexual and Reproductive Health 2024
STUDIES WITH TRIMIX GEL IN MEN WHO FAILED PHOSPHODIESTERASE INHIBITORS (2008)
Joel L Marmar, Thomas J Harkins, John Riordan*. Camden, NJ, and Cherry Hill, NJ.
* Thus, 40.4% of the study group had erections that were sufficient for penetration
* pilot data support the use of Trimix gel for ED, but more prospective trials are needed.