Multi-Family Residential District (R-3) regulations are established in order to achieve, among others, the following purposes:
(a) Regulation of the bulk and location of dwellings to obtain proper privacy and useable open spaces appropriate for the various districts;
(b) Regulation of the density and distribution of population to avoid congestion and to provide adequate public services;
(c) Protection of the desirable characteristics and promotion of stability of existing residential development;
(d) Development of attached single-family and multi-family dwellings with a minimum project size of five acres and a maximum density of 15 dwelling units per acre.