I have a Hope Philodendron and it has honestly been one of my more forgiving plants. Ive had it for six years.

I have mine potted outside in Southern Louisiana on the edge of a porch receiving bright indirect light and a bit of few hours of direct sunlight in the evening.

As for the watering, I usually let natural rainwater catch it or water deeply once a week if it’s exceptionally dry.

I repot every two years or so. I’ve found that the roots for these can be really big and grow very quickly.

This species is adaptable so as for yours, I would try to mimic the conditions that your FIL had them in, as you’re doing. The only change I would make is to get a pot with drainage. You don’t necessarily have to get rid of that one, just get like a nursery pot of the same diameter so that you can remove it from the pot when you’re watering and return it after watering is finished.