(1) In the preparation of the plan of improvement, a central business improvement district is authorized to employ architects and engineers to prepare plans, specifications, and estimates of cost for the construction of the improvements and to supervise and inspect the construction.
(2) In addition, the district is authorized to engage and pay attorneys, accountants, and consultants and to obtain and pay for such other professional and technical services as it shall determine to be necessary or desirable in assisting it to effectively carry out the functions, powers, and duties conferred and imposed upon it to accomplish and maintain the proposed improvement.
(3) The district is further authorized to employ, on a full-time basis, such persons as shall be necessary to maintain, operate, supervise, repair, administer, or otherwise render assistance in the effecting of the plan and its continued benefit.
(4) All expenditures under this section shall be taken as a cost of the improvement.