Commas after introductory phrases

The parallel structure of this sentence is not well implemented, the pronoun "it" is unclear,  there is one comma error, and the main clause is awkwardly phrased:

1. "creating a new brand image" and "implementing [a new brand image]" have parallel grammatical structure. Combine them into a compound subject:

"creating and implementing a new brand image"

2. Doing step one eliminates the need for the pronoun in "implementing it," so the pronoun in "it would be suggested" is no longer unclear.

3. The subordinate introductory clause "Since creating and implementing a new brand image is quite involved" must be set off from the main clause by a comma:

“Since creating and implenenting a new brand image is quite involved, it would be suggested that consulting would be done over approximately one year.”

4. Verb tense is awkard in the main clause:

“Since creating and implenenting a new brand image is quite involved, it is [this tense agrees with "is quite involved"] suggested that consulting should [this tense shows that consulting is only a hypothetical situation] be done over the course of approximately one year.”