After relocating to Arizona in 1978, Mr. Earle dealt in raw land and established Newport Properties to conduct general real estate brokerage. A branch office was opened in Casa Grande in 1981 which conducted primarily farm and ranch brokerage.

During approximately the same period, Mr. Earle created a unique condominium-  convertible fourplex apartment design and eventually developed 37 fourplex lots, 11 fourplexes and 24 condominiums. The design was subsequently widely copied by other builders.

In early 1985 Mr. Earle applied his unique expertise in Pinal County real estate and his strong belief in the future of the area to concentrate fully on land investment, brokerage and syndications in that area. Completing approximately 100 transactions in the period between 1985 and 1987, he and his related partnerships and investors controlled over 50 parcels of land consisting of approximately 3,000 acres.

Based on his fundamentally technical approach to the land business, Mr. Earle tracked every land sale in Pinal County on a daily basis between 1985 and 1988. As a result of this specialized knowledge he became generally known as an expert and established a land valuation consulting practice.

As a consequence of dealing successfully with the effect of falling land values (after 1987), he began in 1990 to accept outside clients in a partnership management/workout capacity. A new company, Rock Earle & Associates LLC, specializing in Syndication and Asset Management was formed in 1991, which, at its peak in the mid-nineties, managed about 45 partnerships.

Mr. Earle personally relocated to Pinal County in 1997, re-established the tracking of land sales with a custom database and computer-generated maps, and re-invigorated his land brokerage business to about 30 transactions annually - a pace that continued into 2004 - primarily representing investors and developers in land acquisitions.