I'm going to suggest that the "buy" case actually has far more interested parties trying to extract money.
In no particular order:
- Financing company
- Realtor x 2 (both seller and buyer)
- loan servicing company (may or may not be the financing company)
- Insurance companies (multiple, depending on how financing is achieved, everything from property itself, to title, to PMI)
- Appraisers
- Home inspectors
- Closing attorneys
- County tax office
- City tax office
Basically... there's a reason that renting is the right call if you're not buying to hold for at least 5 years, ideally 10.
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There absolutely is speculation in housing markets, but at least in the markets I'm familiar with - it's not really the landlords who are renting houses that are doing the speculation. It's the folks who buy up 100+ houses in depressed/low-income neighborhoods during recessions and then sit on empty property for years.