If you can swap buildings, then nothing becomes impossible, let alone difficult. so we go from difficult with meaningful choices, to so easy it's pointless.
You might find it helpful to activate the "built in, in-game, storage grid"*tm. That is accomplished by performing the following sequence:
1) Buy or earn your next expansion
2) Don't build anything on it. Ever.
- Voila! Instant storage of buildings up to 5x5.
- it is possible repeat the above steps to double (or more!) your in-game storage.
* "built in, in-game, storage grid" is a trademark of SarcasticAshrem. Questions about its use should be directed to him, not the developers. Manna not included. Not for use by children under the age of 7. Ensuing laughter may represent a choking hazard. Possible side effects might include any or none of: Black/tarry stools, bleeding, blistering, bloody stools, bone pain, burning, coldness, difficulty in moving, discomfort or pain in chest, enlarged heart, feeling of pressure, fever, hives, infection, inflammation, joint pain, lumps, numbness, paleness of skin, rash, redness, scaring, seizures, shortness of breath, troubled breathing, tightness in chest, or wheezing, soreness, stinging, sweating increased, swelling, swollen joints, tenderness, tingling, ulceration, unusual tiredness or weakness, vomiting of blood or material that looks like coffee grounds, warmness at site, weight gain (occurring together with any of the other symptoms listed before), Blue lips and fingernails, convulsions (seizures), difficulty in speaking, slow speech, or inability to speak, faintness, feeling of heaviness in chest, headache (severe), inability to move arms, legs, or muscles of the face, nausea and vomiting (occurring together with a headache), no blood pressure or pulse, pain in back or left arm, painful, red lumps under the skin, mostly on the legs, prominent superficial veins over affected area, stopping of heart, unconsciousness, vision problems (occurring together with a headache), warmth, , Severity: Moderate, , If any of the following side effects occur while taking tretinoin, check with your doctor or nurse as soon as possible:, Any change in vision (not occurring with a headache), coughing, sneezing, sore throat, and stuffy or runny nose, cracked lips, crusting, redness, pain, or sores in mouth or nose, decreased urination, earache or feeling of fullness in the ear, increase or decrease in blood pressure, irregular heartbeat, mental depression, pain in stomach, side, abdomen or back, pain and swelling in leg or foot, skin rash, swelling of abdomen (stomach area), swelling of face, fingers, hands, feet, or lower legs, Bone swelling, cramping or pain in stomach (severe), difficult or painful urination, drowsiness (very severe and continuing), hallucinations (seeing, hearing, or feeling things that are not there), hearing loss, heartburn, indigestion, or nausea (severe and continuing), mood, mental, or personality changes, pain in lower back or side, swollen area that feels sore and tender, yellow eyes or skin,.