1. se sugiere buscar una casa en un barrio seguro (safe).
2. se insiste en mirar los baños, la cocina y el sótano.
3. se recomienda comparar precios de varias casas antes de decidir.
4. se aconseja hablar con los vecinos del barrio.

1. Te sugiero que busques una casa en un barrio seguro.

2. Te insisto en que mires los baños, la cocina y el sótano.

3. Te recomiendo que compares precios de varias casas antes de decidir.

4. Te aconsejo que hables con los vecinos del barrio.

Explanation:

Subordinate noun sentences are equivalent to a noun noun or noun phrase, so they perform the same functions as this one (subject, attribute, CD, term of a prepositional phrase).

1. They are introduced by a nexus or an infinitive.

2. They are switchable by a noun. But since substitution is not always possible, it is recommended to switch them to a neutral demonstrative pronoun: THIS, THAT, THAT.

the first is correct, the second is "la tienda de descuentos" meaning "the discount store", and the third is "ayer" meaning "yesterday".