Ilse's experience as an interior designer and owner of a successful design firm suggests she has strong skills in space planning, kitchen and bath design, and residential design. Her 18 years of experience indicate she has a solid track record of delivering results. However, her location in Galveston, Texas, may impact her earning potential compared to larger cities. Considering these factors, I estimate her hourly rate to be around $125, which is slightly below the national average for interior designers in the United States. This rate is also lower than what experienced interior designers in larger cities might charge, but it reflects Ilse's specific experience and location.