I am going to page @Rick19744 for this as a result of his vast knowledge and experience in pass-through business entities, but a couple of notes in the interim.
1) You would greatly benefit from local, professional guidance (either a tax professional or attorney).
See https://taxexperts.naea.org/listing/service/business-tax-preparation
See also https://www.avvo.com/tax-lawyer.html
2) Your current entity (entities) structure might not be appropriate for your specific business and may need to be reevaluated.
3) A parent company typically has the ability to file a consolidated return, which could possibly eliminate one (or more) of your issues.
4) Hobby loss rules do not apply to C corporations but do apply to S corporations. Regardless, all factors have to be taken into consideration (not just the mere fact that there are losses).
See https://www.irs.gov/pub/irs-news/fs-08-23.pdf
