I am really trying to find a route alternative to that under the impression that loans are not assumable on average.

Some get materials cheaper than others and some have more of an eye for design than others 

You can use alternate financing (assumed loan, sub-to, owner financed, etc).  

They don't want to add other homes that are to the same standard or material. 

An alternative if you wanted to keep it rent neutral would be to stipulate payments on the 1st and 15th of the month, which would give you an even 24 payments over the year. 

., $50-$100 per visit)Hourly rate for time spent on-site (typically $50-$100/hour)Additional charges for parts or materials usedRetainer agreement:Monthly flat fee (e.g., $200-$500) for basic availabilityAdditional charges for actual work performed beyond a set number of hours or visitsPer-task pricing:Agree on set prices for common tasks (e.g., $75 to unclog a drain, $50 to replace a lockbox)I like the per-task pricing as long as your maintenance calls aren't super frequent.I'm also a hard money lender if you're looking at a new deal to get quotes on soon or if you're looking to refinance a property soon!

The marketing materials referenced were published on different dates and referenced different points in time.

Alternatively, would it be better to continue purchasing new homes with each move (approximately every 3 years) to gradually build my portfolio?

BP loves to take material from their boards and act like it's theirs. 

Again, assuming this transaction is in CA.Here's some initial reading for you, which may help:Civil Code § 2945.4 CC - Foreclosure Consultant Violations (shouselaw.com)************************Alternative options may be to purchase the 1st TD and do the foreclosure yourselves, or gather the cash and buy it at the trustee sale.