Swimming gear

HI I recently moved to Brazil and I am training exclusively in an outdoor non heated swimming pool. Summers are great but fall and winter get rather cold. I am rather skinny and intolerant of cold water. It makes the training miserable (everyday at 6 AM) and I can't wait to get out of the pool after 45 minutes swim. I also do open ocean swim but do not go out often and only do so when the water is warmer. I finally decided to buy a wetsuit for training in the swim pool but feel unsure of what to buy. I own a wetsuit for surfing and it is great for warmth but unpracticle for swimming (too stiff and too warm for training) . I would like to spend max 200 US$ for the wetsuit or swim skin. Water temperature must be around 18-20 Celsius (which is daily temperature at this time of year) but haven't measured specifically. Help anyone ? Would a vest do the job, should I buy a fulllenght wetsuit? will it last in the swim pool ? Thanks Isabelle

HI I recently moved to Brazil and I am training exclusively in an outdoor non heated swimming pool. Summers are great but fall and winter get rather cold. I am rather skinny and intolerant of cold water. It makes the training miserable (everyday at 6 AM) and I can't wait to get out of the pool after 45 minutes swim. I also do open ocean swim but do not go out often and only do so when the water is warmer. I finally decided to buy a wetsuit for training in the swim pool but feel unsure of what to buy. I own a wetsuit for surfing and it is great for warmth but unpracticle for swimming (too stiff and too warm for training) . I would like to spend max 200 US$ for the wetsuit or swim skin. Water temperature must be around 18-20 Celsius (which is daily temperature at this time of year) but haven't measured specifically. Help anyone ? Would a vest do the job, should I buy a fulllenght wetsuit? will it last in the swim pool ? Thanks Isabelle